3results about How to "Extended operating temperature range" patented technology

The application discloses a kind of eutectic solvent and its preparation method and application, the eutectic solvent is used for the dissolution, separation or regeneration of cellulose and / or starch, the eutectic solvent includes first solvent, second solvent and water;The first solvent is selected from at least one of the compounds shown in formula 1.The eutectic solvent of the application has very good solubility for cellulose and / or starch, can quickly dissolve a large amount of cellulose and / or starch, is suitable for the dissolution, separation and regeneration of cellulose and / or starch, etc., and is low in cost, easy to prepare, the raw materials used are all harmless to the environment, can be recycled, is an environmentally friendly solvent system.

This invention provides a liquid crystal composition comprising 40%–70% component I, 0%–20% component II, 0%–20% component III, 5%–40% component IV, and 0%–30% component V. This liquid crystal composition exhibits a high clearing point and low rotational viscosity, which is beneficial for increasing the operating temperature range of the liquid crystal material and improving its response speed.

This invention discloses a method for measuring the attitude of a moving object based on a dual-line laser, belonging to the field of attitude measurement technology. A laser penetrates a reference laser receiving target and strikes a standard laser receiving target. One laser beam is fixedly illuminating a point on the reference laser receiving target. The line connecting the center points of the two targets is parallel to the laser beam and moves synchronously with the moving object. Coordinate systems are established at the center of the left side of both the reference and standard laser receiving targets. The coordinate values ​​of the laser illumination point in each target coordinate system are read, and the attitude angle of the moving object in space is calculated using spatial geometry. The attitude measurement method includes: measuring the yaw angle obtained by rotating the moving object around the Y-axis of the coordinate system, measuring the pitch angle obtained by rotating the moving object around the X-axis of the coordinate system, measuring the roll angle obtained by rotating the moving object around the Z-axis of the coordinate system, and calculating the coordinate value of one of the laser illumination points in the coordinate system of the standard laser receiving target (when no roll occurs).