48results about How to "High repeatable measurement accuracy" patented technology

The invention discloses a large free forging size online measurement device and method. The device is provided with, on two sides of a forging machine, a horizontal and a vertical motion unit, a laser cast-line method length measuring unit, a temperature-measurement edge searching method diameter online temperature measurement unit, a laser correlation telemetry diameter online measurement unit, a laser correlation telemetry diameter offline measurement unit, a laser beam cast-line method diameter visual inspection and early warning unit, and an operating machine position measurement unit installed on the operating machine. Each measurement unit is installed on the horizontal or the vertical motion unit, and is capable of horizontal or vertical motion. The projection laser beam method, the infrared temperature-measurement edge searching method and the laser correlation telemetry are used in the method to obtain the forging diameter, length, size and the forging contour in a horizontal section. The device and the method achieve online and offline measurement for the forging, enhance measurement functions and improve timeliness, accuracy and efficiency of the measurement.

A new type of gel film capacitive sensor and method for measuring the occlusal force of a single pair of teeth. The sensor includes an insulating medium. The upper and lower surfaces of the insulating medium are each pasted with a layer of ion gel as an electrolyte. Both substances are soft and transparent A capacitor that can change with pressure is formed, and a layer of insulating medium is pasted on the upper and lower surfaces to avoid the influence of external parasitic capacitance on the measurement results; the lead wires of the metal electrodes are connected to the acquisition card to form an ion-electronic mixed current circuit. Capacitance signal, through data calculation to obtain the change data of the occlusal force of a single pair of teeth with time; the capacitive sensor uses a new type of gel material to ensure accurate measurement of the occlusal force of the teeth under the condition of restoring the occlusion of the teeth as much as possible, and the material has good repeatability Accuracy, low cost, easy processing, one-time use, clean and hygienic, and high transparency allow the sensor to observe changes in teeth while transmitting electrical signals.

The invention relates to a method for measuring the outer circumference and maximum and minimum diameters of a cylindrical workpiece. The method comprises the following steps of: measuring device preparation; and data measuring and recording. According to the measuring device preparation step, a laser displacement sensor is adopted; and the laser displacement sensor rotates around a to-be-measuredcylindrical workpiece or the to-be-measured cylindrical workpiece rotates around the center axis of the to-be-measured cylindrical workpiece and the laser displacement sensor is stationary. Accordingto the data measuring and recording step, M measuring points are selected from the to-be-measured cylindrical workpiece; measurement is initiated; with every four points taken as a group, the measurement data of every four points are fitted into a circle according to a certain rule; the sum of the arc lengths of two diagonal short arcs is calculated, so that the diameter and arc length of the four-point group is obtained; and the arc lengths of all the four-point groups are added, so that a required perimeter can be obtained; and a maximum value and a minimum value are found out from the diameters of all the four-point groups, so that a required maximum diameter and a required minimum diameter can be obtained. With the method of the invention adopted, the precision and stability of perimeter measurement are improved; and requirements for the roundness of a workpiece and the centering degree of the installation of the workpiece are greatly lowered. The method has a high engineering application value.

A new type of gel film capacitive sensor and method for measuring the occlusal force of full mouth teeth. The upper and lower surfaces of the insulating medium are each pasted with a layer of ion gel as an electrolyte. These two substances are soft and transparent and pasted at several points Ion gel forms several capacitors that can change with the bite force, connect these capacitors in parallel, and paste a layer of insulating medium on the upper and lower surfaces to avoid the influence of external parasitic capacitance, and connect to the acquisition card through the bus to obtain the full bite force The total capacitance value under the action can measure the occlusal force of the whole mouth teeth; the capacitive sensor resultant force measurement device can obtain the full-mouth occlusal force by using a simple parallel circuit, while the piezoresistive force measurement device can only measure one way and cannot complete The measurement of the cumulative sum adopts a new type of gel material to ensure that the occlusal force of the whole mouth can be obtained under the condition of restoring the occlusal teeth as much as possible, and the material has good repeatability measurement accuracy, low cost, easy processing, disposable use, clean and hygienic .