Disclosed is a comprehensive thread checking fixture, includes a no-go end, a handle, a measuring column, a measuring sleeve and a jackscrew. The checking fixture not only can be used for detecting the size of the detected threads, but also can be used for detecting the depth of the detected threads, and has the characteristics of simple structure, high detection precision, strong compatibility, low manufacturing cost and the like at the same time.

Disclosed is a comprehensive thread checking fixture, includes a no-go end, a handle, a measuring column, a measuring sleeve and a jackscrew. The checking fixture not only can be used for detecting the size of the detected threads, but also can be used for detecting the depth of the detected threads, and has the characteristics of simple structure, high detection precision, strong compatibility, low manufacturing cost and the like at the same time.

A right angle touch gauge of the present application includes a fixing block, a floating column, a spring, a measuring column, a measuring sleeve and the like. In use, round head of top end of the floating column is in contact with bottom surface of work piece. The floating column is compressed downward when it touches high surface of the bottom surface of the work piece, the measuring column is compressed to right by matching lower cone of the floating column and left cone of the measuring column, and it may be found whether height difference between high surface and low surface of the bottom surface of the work piece is qualified by observing whether end edge of the right cylinder of the measuring column is placed between steps of right end surface of the measuring sleeve.

A gauge apparatus includes a body member, one or more gauge arms biased outwardly from the body member for engagement with a wall of the elongated space, and one or more deformable regions. The gauge apparatus is configured so that a variation in an outward extension of each gauge arm from the body member induces a change in strain in a corresponding one of the one or more deformable regions. A gauge system includes the gauge apparatus and an optical fiber attached to the gauge apparatus so that a strain in each deformable region of the gauge apparatus is transferred to a corresponding sensor portion of the optical fiber. The gauge system may be used for making real-time measurements of a geometry of an elongated space such as a wellbore of an oil and gas well.

Disclosed is a comprehensive thread checking fixture, includes a no-go end, a handle, a measuring column, a measuring sleeve and a jackscrew. The checking fixture not only can be used for detecting the size of the detected threads, but also can be used for detecting the depth of the detected threads, and has the characteristics of simple structure, high detection precision, strong compatibility, low manufacturing cost and the like at the same time.

A wheel center bore size qualification detection device includes an upper crossbeam, large guide posts, small guide posts, a center go/no go gauge no go end, a center go/no go gauge go end, small guide sleeves, large guide sleeves, a stand, jaws, small air cylinders, a coupling flange A, a coupling flange B, a lower crossbeam, bases, a large air cylinder, a centering pin A, centering pins B, a mobile sensor bracket, a mobile sensor, a detection connecting rod and bracket, a backing plate, connecting bolts and a fixed plate. The device provided has the characteristics of accurate location, practical structure, high detection accuracy, high efficiency, work safety and reliability and the like.

A wheel center bore size qualification detection device includes an upper crossbeam, large guide posts, small guide posts, a center go/no go gauge no go end, a center go/no go gauge go end, small guide sleeves, large guide sleeves, a stand, jaws, small air cylinders, a coupling flange A, a coupling flange B, a lower crossbeam, bases, a large air cylinder, a centering pin A, centering pins B, a mobile sensor bracket, a mobile sensor, a detection connecting rod and bracket, a backing plate, connecting bolts and a fixed plate. The device provided has the characteristics of accurate location, practical structure, high detection accuracy, high efficiency, work safety and reliability and the like.

Measuring assembly with a measuring apparatus and a recognition system, and recognition method to detect the correct positioning of a removable device such as a comparator to check the shape and/or dimensions of a mechanical part with respect to a stationary part that includes at least one mechanical reference for the removable device. The system comprises a field source disposed in the stationary part that generates a field and a matching element disposed on the removable device that is able to alter the propagation of this field if correctly positioned relative to the field source. A sensor fixed to the stationary part in an appropriate position detects or not the field and generates a resulting detection signal detection or non-detection signal. A processing unit receives the signal generated by the sensor and on the basis of this provides information about the correct or incorrect positioning of the removable device with respect to the stationary part. The recognition system can be of the magnetic or optical type.

A tool for evaluating the internal surfaces of tubular is provided, wherein one or more arms extend outwardly from the tool to contact an inner wall surface of the tubular, and changes in the dimensions or condition of the inner wall result in changes in the position of the ends of the arms relative to the tool. This motion is converted, through an electromagnetic transducer. The probe arms extending from the tool are releasably held in bores formed by opposed members on the tool, within which the probe arms may pivot. The internal end of the probe arms need not be physically secured to an internal element of the tool, yet still enable motion of an internal components to actuate a transducer to provide electrical signals indicative of the tip of the probe arm relative to the tool as the tool traverses a tubular, such as a wellbore casing.

There is provided a thin-bottom type bore gauge having damping unit between a gauge head and a head main body part, and a long life. A head part of a bore gauge includes a head main body part, a measurement spherical face at one end face, and a gauge head slidably provided by penetrating an inside and an outside of the head main body part. The gauge head a spring holding groove carved in a circumferential direction at the other end side, and a compression coil spring is interposed between the spring holding groove and an inside end face of the head main body part.