31results about How to "Affect the measurement result" patented technology

The invention discloses a method for measuring the lateral shift of a tunneling machine. The method comprises the following steps: 1) installing two independent vertical flat reflecting surfaces F1 and F2 at an initial calibration point in a tunnel, wherein the vertical flat reflecting surfaces F1 and F2 intersect up and down to form a certain angle [theta], and the length directions of the vertical flat reflecting surfaces F1 and F2 are located in the horizontal direction and match the width of the tunnel; 2) installing a laser range finder A and a laser range finder B on the tunneling machine and at different heights to measure the distance between the two vertical flat reflecting surfaces F1 and F2 separately; 3), creating a three-dimensional coordinate; 4) monitoring the support distance LX of the tunneling machine in a support process, wherein the distance between the laser range finder A and the reflecting surface F1 is LA, and the distance between the laser range finder B and the reflecting surface F2 is LB; and 5) enabling a tunneling machine controller to automatically correct a trajectory in real time according to the shift direction and the shift distance measured in the step 4). The method is not liable to easy miss the target and wide in coverage.

The invention relates to a water-cooled pressure measuring probe applicable to high-enthalpy airflows. The water-cooled pressure measuring probe comprises a casing, a first sealing member, a second sealing member, a first air inlet pipe, a second air inlet pipe, a test hole, a support member and a bottom plate. The casing comprises an outer casing and an inner casing, the outer casing is providedwith a first water inlet and a first water outlet, and a hollow interlayer with a closed rear end is arranged between the outer casing and the inner casing. The hollow interlayer comprises a front region and a rear region, the front region is divided into an upper cavity and a lower cavity by two blocking portions arranged along the length direction of the casing, the upper cavity is communicatedwith the rear region, and a sealing portion is arranged between the lower cavity and the rear region for sealing. The first water inlet is located on the lower side of the lower cavity, and the firstwater outlet is located on the lower side of the rear region. The first sealing member comprises an outer sealing member for sealing the front end of the outer casing and an inner sealing member for sealing the front end of the inner casing, and a front cavity communicated with the upper cavity and the lower cavity is formed between the outer sealing member and the inner sealing member. The water-cooled pressure measuring probe can meet the measurement requirements for the stagnation pressures of ground simulation tests for heat-insulating materials by high-enthalpy devices.

The method involves positioning cross-wound bobbin change aggregate (23) in succession at working locations (2) of a textile machine (1), and providing a measuring device i.e. thread handling elements, for measuring position of the working locations. A set of values is determined for a subsequent positioning of the thread handling elements at the working locations of the textile machine. The thread handling elements are driven in contact with a housing of the working locations in a given usage position. An independent claim is also included for a cross-wound bobbin change aggregate comprising a control device.

The invention provides a measuring device and a lithography machine, the measuring device is used to detect the polarization phase difference of the measuring light, the measuring device includes a measuring body, a wave plate, a polarizing plate, a rotating table and an image acquisition and analysis unit, the rotating The table, the polarizer and the image acquisition and analysis unit are arranged on the measurement body, the rotating table is used to drive the wave plate to rotate, and the measurement light enters after passing through the wave plate and the polarizer The image acquisition and analysis unit, the image acquisition and analysis unit is used to collect and analyze the measurement light and obtain the polarization phase difference, the measurement device also includes a cooling component, the cooling component is used to absorb the image acquisition and analysis unit and / or the heat of the turntable. The measurement device and the lithography machine in the present invention can improve the stability of the measurement device and the lithography machine.

The invention relates to an eddy current loss measuring system and method of a permanent magnet. The system comprises a detector, a power amplifier, a differential amplification circuit and a digitalsignal processing unit; the detector comprises two U-shaped magnetic cores facing each other, excitation windings wound around magnetic poles of the U-shaped magnetic cores respectively, a magnetic core fixing support for fixing the magnetic cores, a position fixed support, a bottom support platform and a sample fixing support; the upper portion of the magnetic core fixing support is provided withgrooves which match the shapes of the magnetic cores, and the magnetic cores can be just fixed in the grooves respectively after winding of the excitation windings; the lower portion of the magneticcore fixing support is provided with a sliding groove; the sampling fixing support is fixed on the bottom support platform between the two U-shaped magnetic cores; and the excitation windings are connected in series and then connected to the digital signal processing unit via the power amplifier. Thus, the practical operation condition of the magnetic field of the motor can be simulated, the totalloss condition of the permanent magnet is reflected accurately, and the method is highly repeatable.

The invention relates to the technical field of electromyogram recording sensor devices and discloses a sensor device for electromyogram recording of skin muscle signals. The sensor device comprises aflexible strap, the surface of the flexible strap is fixedly connected with a hollow passage which is movably connected with a positioning groove, spring supports are movably connected to two sides of the positioning groove respectively, compression springs are movably connected in the spring supports, and a slide rod is movably connected to one end, away from the positioning groove, of each spring support. A storage box is fixedly connected to the top end of each slide rod. Sarcolemma action potential changes are converted into strong electrical signals to attract elastic rods to extend andretract so as to pull the positioning groove to move; due to symmetrical design of electromagnetic coils, magnetic forces generated by the electromagnetic coils are unequal; in addition, the electromagnetic coils drive the slide rods to slide on surfaces of slide rails when extruding the elastic rods to move, so that the positioning groove is driven to move by extrusion plates, and an effect of positioning wearable sensors is achieved.

A dynamic state monitor of roof for filling coal mining goaf in a comprehensive and mechanized way is composed of a monitor base, a multiplestage telescopic rod and a floor offer (12). The monitor base is composed of a base cylinder (5), a spring (6), a transmission cable (13), a pattern displacement meter (15) and a guide rod (7). A displacement meter support (9), a protective port (11), a spring seat (8) and range limiting plates (16, 17) are arranged in the base cylinder. The pattern displacement meter (15) contains a chip (14). The base cylinder (5) is fixed on the floor offer (12) with screws. The spring (6) is arranged in the bayonet slot of the spring seat (8), the pattern displacement meter (15) is arranged in the bayonet slot of the displacement meter support (9), the guide rod (7) is directly connected to the pattern displacement meter (15), the guide rod (7)and the pattern displacement meter (15) are sleeved in the spring (6), and the transmission cable (13) is connected with the chip (14). The multiplestage telescopic rod is composed of a first stage rod (4), a second stage rod (20) and a third stage rod (21), wherein the first stage rod is installed in the base cylinder (5)and is in direct contact with the range limiting plates (16, 17) on the guide rod (7). The second stage rod (20) is fixed in the installation groove in the first stage rod (4) with a fastening bolt (19), and the third stage rod (21) and the second stage rod (20) are fixed with a fixing bolt (2). The monitor can directly and accurately monitor the dynamic subsidence amount of the roof, and is ingenious in structure and convenient to use.

The invention discloses a candy boiling device, which belongs to the field of candy boiling. A candy cooking device, comprising a lifting cover, the lifting cover is slidably connected to a fixed vertical plate, the fixed vertical plate is fixedly connected to a boiling box, and a temperature measuring shell is fixedly connected to the lifting cover. It can realize the high-temperature heating of the liquid candy in the cooking box by using liquid ammonia in the temperature measurement tube, and condense and evaporate again through the ammonia condensation tube and the U-shaped liquid ammonia evaporation tube, so that the hot air cylinder and the cold air cylinder respectively form hot air and Air-conditioning, when the ambient temperature of the infrared temperature sensor in the temperature-stabilizing shell is too low, the hot air cylinder blows hot air, and when the ambient temperature is too high, the cold air cylinder blows cold air to ensure the stability of the ambient temperature of the infrared temperature sensor, while the hot air cylinder And the cold air cylinder blows air to the temperature measuring duct in the cooking box through the mixing tube, so that the water vapor is discharged through the steam outlet, effectively avoiding its influence on the measurement results.

The invention discloses a method of measuring a distance between ground force bearing points of a plane and a system. The plane is drawn on three weighing platforms, and positions of force applying points on the weighing platforms can be conveniently and accurately measured by adopting a torque balancing principle. The advantage that force borne by four weighing sensors on each weighing platform can be independently outputted is used, the torque balancing principle is adopted, the positions of force applying points on the weighing platforms can be conveniently and accurately measured, distances between ground force bearing points of the plane measured by the method are the positions of ground actual force applying points, the fact that the traditional length measurement tool such as a tape measure is used for measuring the connection line length of plane wheel geometric center points rather than the ground actual applying points of the plane wheels, and thus the plane gravity center measurement result is influenced can be avoided, the method provides accurate distance parameters for calculating the gravity center of the plane, and the calculated plane gravity center data can be ensured to be accurate and reliable.

A method for detecting the residual stress of a workpiece is provided. The method comprises 10 steps: confirming a detection portion and formulating a coordinate system, grinding the surface of the detection portion, cleaning the surface of the detection portion, sticking and inspecting the strain gauge, performing strain gauge protection, performing strain gauge connection inspection, measuring and zeroing the initial value of the strain gauge, selecting a calibration sample, cutting the workpiece and reading the strain value, and calculating the strain force. According to the method providedby the present invention, the method for processing the surface of the workpiece, the method for sticking the strain gauge, and the connection requirements for the wire are described in a detailed manner, the environmental factor is considered and the error is reduced.