5results about How to "Affect measurement accuracy" patented technology

The application provides a downhole optical fiber fixing device and a mounting method thereof. The optical fiber is fixed in the downhole through an outer pipe during well drilling. The outer pipe of the device is in contact with the well wall through a fixing part and a supporting part, so that the optical fiber is effectively protected from being damaged in the later carbon dioxide injection process. The device can fix the optical fiber at the central part outside the downhole casing, so as to prevent the optical fiber from being too close to the downhole casing or the outer well wall and forming measurement error, and affecting the measurement accuracy of the instrument. The included angle between the supporting part and the fixing part is adjustable, so that the downhole operation of different diameters can be met. Meanwhile, the fixing part and the outer pipe are detachably connected, so that the installation and the later disassembly are facilitated.

The present disclosure provides an opening and closing radar protection device, comprising a mounting frame, a protective cover, a driving device and a guide device, the driving device and the guide device are arranged on the mounting frame, one end of the guide device is connected with the protective cover, the other end of the guide device is connected with the driving device, the driving device is used for driving the guide device to move so that the protective cover rotates at the opening end of the mounting frame; the protective cover is used for closing the opening end of the mounting frame. The present disclosure also provides a material level measuring system. The present disclosure sets an opening and closing protection device to protect the scanning radar, reduces the influence of dust and other impurities on the use of the scanning radar, and improves the service life of the scanning radar and the measuring accuracy of the system.

The invention relates to the technical field of clip-on ammeters, in particular to a clip-on ammeter for residual current detection, which comprises a residual current handheld meter body and a residual current sensor, and a connecting wire is arranged between the residual current handheld meter body and the residual current sensor. The structure of a fixed annular jaw and the structure of a movable annular jaw are optimally designed, a jaw closing mechanism is integrated at the closed position of the end of the jaw and combined with a negative pressure attaching assembly, it is ensured that the jaws are completely and tightly attached when closed, and the problems that tiny gaps exist, consequently, a magnetic circuit is incomplete, and the uniformity and measurement precision of a magnetic field are affected are solved; and the annular protective cover plate is matched with the inner side tong head magnetic core mechanism, so that gap compensation at the magnetic core mounting cavities on the inner sides of the fixed annular jaw and the movable annular jaw is met, mounting protection of the magnetic core assembly can be achieved, and auxiliary heat dissipation of the magnetic core assembly in the working state can be assisted.

The utility model relates to the technical field of test clamps, and discloses a magnetic type fixed multifunctional test clamp, which comprises a test clamp, one side of the top end of the test clamp is provided with a placing groove, one side of the placing groove is communicated with a detection groove, the other side of the detection groove is communicated with a material groove, and the test clamp is provided with a positioning mechanism. According to the technical scheme, materials needing to be detected are concentrated in the transparent rectangular box by an operator and placed in the material groove to correspond to the transmitting end of the photometer, the operator needs to extrude the abutting block before the materials are placed in the material groove, so that the spring connected with the outer wall of the abutting rod in a sleeving mode is in a compressed state, and after the material box is placed in the material groove, the abutting block is pressed. An operator loosens the abutting block, the abutting block is extruded on the side wall of the material box through the extrusion force of the spring on the outer wall of the abutting rod, one end of the material box is firmly extruded on the side wall of the material groove, it is guaranteed that materials can be kept stable and firm when the photometer detects the materials in the material box, and the photometer is practical and suitable for wide application and popularization.

This utility model discloses an online monitoring device for marine methanol consumption, including a turbine flow meter body. A first flange is mounted on the surface of the turbine flow meter body. A second flange is threadedly connected to the surface of the first flange using a bolt assembly. A filter tube is connected to the surface of the second flange. A third flange is connected to the other side of the filter tube. A limiting groove is formed on the inlet end surface of the third flange. A limiting post is connected to the surface of the limiting groove. A rubber block bonded to the inner wall of a connecting lug is engaged with the surface of the limiting post. The surface of the connecting lug is fitted into the surface of the limiting groove and is connected to the inlet end surface of the filter screen cylinder. This utility model, through the cooperation of the filter tube installed on one side of the inlet end of the turbine flow meter body and the filter screen cylinder engaged within the filter tube, intercepts large particulate impurities in methanol, preventing them from directly entering the turbine flow meter body, causing wear, and thus affecting the methanol measurement accuracy.