114 results about "Force curves" patented technology

A force scanning probe microscope (FSPM) and associated method of making force measurements on a sample includes a piezoelectric scanner having a surface that supports the sample so as to move the sample in three orthogonal directions. The FSPM also includes a displacement sensor that measures movement of the sample in a direction orthogonal to the surface and generates a corresponding position signal so as to provide closed loop position feedback. In addition, a probe is fixed relative to the piezoelectric scanner, while a deflection detection apparatus is employed to sense a deflection of the probe. The FSPM also includes a controller that generates a scanner drive signal based on the position signal, and is adapted to operate according to a user-defined input that can change a force curve measurement parameter during data acquisition.

A force scanning probe microscope (FSPM) and associated method of making force measurements on a sample includes a piezoelectric scanner having a surface that supports the sample so as to move the sample in three orthogonal directions. The FSPM also includes a displacement sensor that measures movement of the sample in a direction orthogonal to the surface and generates a corresponding position signal so as to provide closed loop position feedback. In addition, a probe is fixed relative to the piezoelectric scanner, while a deflection detection apparatus is employed to sense a deflection of the probe. The FSPM also includes a controller that generates a scanner drive signal based on the position signal, and is adapted to operate according to a user-defined input that can change a force curve measurement parameter during data acquisition.

The invention discloses a method for determining typical sunrise force curves of a wind power station, and relates to electric power deployment and wind power planning. The method comprises the following steps of: firstly, respectively clustering wind power sunrise force curves according to system peak regulation requirements, counting the probability of different types of curves, and selecting representative curves; and then, placing each representative curve into a system to perform production run simulation, performing probability weighted sum on results to obtain expected values of each technical and economic index of the system, such as wind power generating capacity, thermal power generating capacity, thermal power peak regulation depth, abandoned wind power quantity, thermal power fuel consumption, expected values of pollutant discharge and the like, and then evaluating the peak regulation economical efficiency of a given wind power grid system. The method has the advantages that the randomness of wind power output is considered, and the method is adopted to the conventional electric power and electric quantity balance computation; the conventional electric power system planning research method is enriched, and the depth of wind power system planning researches is improved; and power enterprises can develop electric power system operation simulation software products comprising wind power systems according to the method.

The invention relates to a sodium hyaluronate injection sterilization method for guaranteeing aseptic packaging, and the method comprises the following steps: firstly, determining sterilization parameters for the fewest degradation of sodium hyaluronates in different concentrations and specifications, and determining the temperature and the time when a certain sterilization effect is achieved; then, under the condition of the temperature and the acting time, obtaining expansive acting force curves of sodium hyaluronate injections (in different concentrations and specifications) in an aseptic packaging type prefillable syringe; setting the acting force value of each expansive acting force curve into a control program of sterilization equipment, thereby obtaining automatic back-pressing control programs for product sterilization in different concentrations and specifications; and in the process of sterilization, introducing a certain proportion of compressed air to carry out back pressing, so that the pressure of a sterilizing chamber is controlled so as to prevent aseptic packaging from being damaged due to the displacement of a rubber plug.

With a scanning probe microscope, if a plurality of sample properties are measured using a scanning scheme of allowing a probe to approach and withdraw from a sample, the sample properties need to be accurately and reliably detected in the minimum required measurement time. Further, the acting force between the probe and the sample varies depending on the type of the probe and the wear condition of a probe tip. Thus, disadvantageously, property values acquired using different probes cannot be compared with one another unless the artifactual effect of the measuring probes are eliminated. In accordance with the present invention, with a scanning probe microscope, the probe is brought into intermittent contact with the sample, while driving means repeatedly allows the probe to approach and withdraw from the sample with a variable amplitude. The sample property is thus acquired at a high speed. Further, a calibration sample is used in a given environment (given temperature and humidity) to acquire a force curve for at least one point. Information obtained from the force curve is used to correct measurements to display the distribution of the sample property.

The invention discloses an intraocular tension testing method and an intraocular tension testing device based on a magnetic interaction. The method comprises the following steps: (1) wearing a corneal contact lens embedded with an inner magnetic disk to make the inner magnetic disk closely contact with the corneas; (2) placing another outer magnetic disk in front of the eyes perpendicular to the inner magnetic disk to make the two magnetic disks form a mutually repulsion force field; and (3) with the movement of the outer magnetic disk, picking up a repulsive force curve by a pressure sensor, and calculating the intraocular tension value through the inflexion point or the slope change of the curve. In the technical scheme of the invention, the outer magnetic disk is driven to move forward or backward by a built-in straight-line motion mechanism to adjust the repulsive force between the outer magnetic disk and the inner magnetic disk so as to realizing pressure application without contacting, and the measuring head can not directly contact with the eyeballs, thereby causing no pain; the invention does not require the testing of a doctor, the patient can operate individually, and the device can automatically calculate and store the measured intraocular tension value. When the invention is used, the intraocular tension can be tested by the method of calculating and obtaining the intraocular tension value through the curve of the repulsive force between the inner magnetic disk in the corneal contact lens and the moving outer magnetic disk, and the testing result can be accurate and reliable by performing the intraocular tension testing for five times and taking the average value.

The non-destructive measurement method of nanometer cantilever thickness based on force curve of atomic force microscope includes the first scanning measurement to obtain the 3D topographic information of the nanometer cantilever area and the distance between the upper surface and the base of the nanometer cantilever; the subsequent reducing the scanning range to locate the probe of the atomic force microscope precisely and to load and unload vertically with the probe until the lower surface of the nanometer cantilever contacts with the base and the force curve exhibits turnover, and recording the real-time force curve of the atomic force microscope during loading and unloading to obtain the distance between the lower surface and the substrate of the nanometer cantilever; and finally subtracting the data obtained in the foregoing steps to calculate the nanometer cantilever thickness. The said method may be also used in measuring other dimensions of nanometer structure.

The invention discloses a method for detecting physical characteristics of nano-scale soot microparticles. The method is used for simultaneously detecting the three-dimensional morphology, mechanical characteristics and degree of graphitization of the same position of each nano-scale soot microparticle by using an atomic force microscope and Raman spectrometer combination system and comprises the following steps: acquiring the three-dimensional morphology, force curve and Raman spectrogram of a nano-scale soot microparticle sample, and carrying out peak-differentiating-imitating on the Raman spectrogram by using software origin so as to evaluate the degree of graphitization of the nano-scale soot microparticle sample; finally obtaining the mechanical characteristics of the nano-scale soot microparticle sample, wherein the mechanical characteristics comprise an adsorption force, a van der Waals force and an adhesion force. According to the method and the application thereof, the rule of evolution of the three-dimensional morphology, mechanical characteristics and degree of graphitization of soot microparticles generated from different source combustion processes can be researched, and research results contribute to the deep understanding of generation and evolution mechanisms of the soot microparticles, so that a theoretical instruction is provided for the reduction of emission of the soot microparticles and the control on atmospheric environment pollution.