6results about How to "Reliable measurement data" patented technology

The utility model relates to rail transit engineering technical field discloses a kind of subway laser chord measurement devices with scale mark, including rail, the top of the rail is slidably connected with laser emission device, the top of the rail is slidably connected with target, the top of the rail is slidably connected with moving target, the inside of the laser emission device is installed with height adjusting mechanism, the target includes lifting device, the bottom of the lifting device is fixedly connected with permanent magnet, the top of the lifting device is provided with grid scale board, the height adjusting mechanism includes rotating handle.In the utility model, the height of laser can be dynamically adjusted according to track settlement and local deformation, so that the laser reference line can be attached to the track measurement reference surface, thereby ensuring the accuracy and reliability of measurement data, providing data support for track maintenance operation, reducing the situation of maintenance not in place and reducing the safety hidden trouble of train operation.

This invention provides a wind tunnel test angle-of-attack adjustment device and its calculation method. The device includes an angle-of-attack mechanism, a suction mechanism, a front wind speed sensing component, and a rear wind speed sensing component. The suction mechanism includes a suction channel and a fan. Both the front and rear wind speed sensing components include a high-sensitivity sensor and a lifting drive component. The front wind speed sensing component also includes a low-sensitivity sensor, located downstream of the suction channel. The high-sensitivity and low-sensitivity sensors are connected to the fan and the lifting drive component via a control unit. The method includes selecting a working sensor based on the test angle of attack adjusted by the angle-of-attack mechanism; setting the target boundary layer thickness and the wind tunnel set flow rate; adjusting the real-time power of the fan; controlling the height of the working high-sensitivity sensor; and obtaining the flow rates of the high-sensitivity and low-sensitivity sensors; adjusting the real-time power of the fan based on the flow rates of the high-sensitivity and low-sensitivity sensors. This invention has advantages such as effectively controlling the boundary layer thickness and improving test accuracy.

The utility model discloses a kind of track vehicle over sub-phase induction receiver height measuring equipment, it includes the fixed frame inserted on steel rail, the top of fixed frame is fixedly connected with longitudinal measuring scale, longitudinal measuring scale surface is slidably connected with transverse measuring scale, transverse measuring scale includes slider that is sleeved in longitudinal measuring scale, slider one side is fixedly connected with metal ruler, the bottom of metal ruler is fixedly connected with level gauge.The equipment can effectively improve the installation size of measuring track vehicle over sub-phase induction receiver, the height of induction receiver distance steel rail can be quickly measured using longitudinal measuring scale, the transverse distance of induction receiver distance steel rail can be quickly measured using transverse measuring scale, it is simple and convenient to use, longitudinal measuring scale surface is also installed with limit magnet, can be well positioned fixed to transverse measuring scale, effectively improve the stability when measuring, ensure that measurement data is accurate and reliable, provide more powerful guarantee for the safe operation of track vehicle.

The utility model discloses a device for rapidly measuring the slope ratio of a side slope, and solves the problems of complex operation and low efficiency of a traditional measuring mode. The device is composed of a square shell, a movable rod, a gravity ball, a transparent scale plate and an anchoring assembly. The shell is fixed to a slope through the anchoring assemblies at the four corners of the bottom, the movable rod drives the gravity ball to naturally droop, slope rate data can be directly read through the scale plate on the side wall, measurement only needs 1-2 minutes, and professional leveling calculation is not needed. The electromagnetic adsorption blocks on the inner side of the shell are matched with the buffer pads, gravity balls are adsorbed and fixed during transportation, and collision errors are reduced; and the release is accurate during measurement. An anchoring rod of the anchoring assembly is combined with a spring and a locking groove, and the fixing device can be stabilized in complex terrains. The device is simple in structure, convenient to operate and suitable for slope ratio measurement of geological and municipal engineering slopes.

The utility model belongs to the technical field of reinforcing steel bar measurement, and particularly relates to a full-automatic reinforcing steel bar weight and length measuring detector, which comprises a cabinet, a weighing element and a length measuring element, a user can place a reinforcing steel bar sample to be detected on a weighing plate, fix the reinforcing steel bar according to latches, turn on a power switch, enable the machine to start to run through an operation button and a controller, and measure the length of the reinforcing steel bar. The weighing sensor transmits measured data to the controller and displays the measured data on the controller, the sliding bar moves up and down along the guide rail, so that the laser probe scans the length of the detected reinforcing steel bar, the laser probe transmits the data to the controller after scanning, weighing and length measurement can be completed synchronously, the position of the reinforcing steel bar does not need to be changed, and the working efficiency is improved. The full-automatic system reduces the use cost and shortens the measurement time, the full-automatic control system has data storage and uploading functions, the length of each test piece and the total length of all the test pieces are displayed through length measurement, the total weight of all the test pieces is displayed through weighing, and measurement data are accurate and reliable.

The utility model relates to gear M value measurement technical field especially a kind of self-centering device for gear M value measurement.This self-centering device for gear M value measurement, including base, motor, carousel and electric clamp jaw, installation hole is set up in the middle of base, carousel is installed in installation hole by bearing, electric clamp jaw is set up in one side of carousel, its drive end is connected with a pair of clamping jaw, symmetric guide bevel is set up on the opposite inner side of a pair of clamping jaw, forms V-shaped positioning mouth, guide bevel is contacted with gear outer circle when clamping gear, to make gear center automatic alignment to the rotation center of carousel, motor is installed in the other side of carousel by motor base, and its output shaft is connected with driving pulley that drives carousel rotation.The utility model uses electric clamp jaw and carousel, realizes the automatic centering of gear measurement, can significantly improve the measurement efficiency and accuracy of gear M value, saves time.