43 results about "Displacement model" patented technology

A system and apparatus for constructing a displacement model across a frequency range for a loudspeaker is disclosed. The resultant displacement model is centered around the distortion point. Once a distortion model is constructed it can be incorporated into an audio driver to prevent distortion by incorporating the model and a distortion compensation unit with a conventional audio driver. Various topologies can be used to incorporate a distortion model and distortion compensation unit into an audio driver. Furthermore, a wide variety of distortion compensation techniques can be employed to avoid distortion in such an audio driver.

The invention relates to a method of calculating a displacement of an object of interest comprising a step of calculating (101) a displacement model of said object of interest from adjacent images of a set of pre-acquired images of said object of interest, said displacement model reflects the position of said object of interest along the time. The method is characterized in that the method further comprises the following. A step of determining (102) a first sub-set of images (S1) from said set of pre-acquired images within one periodical time cycle of said set of pre-acquired images on the basis of the displacement model. A first step of identifying (103) a second sub-set of images (S2) from newly-acquired images, wherein images in said second sub-set of images (S2) are consecutive and have the same most similar image in said first sub-set of images (S1), wherein a first set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images (S1), and wherein said most similar image has the largest similarity level in said first set of similarity levels. A first step of selecting (104) a given image in said second sub-set of images (S2) as a first reference image (I1). A second step of identifying (105) a third sub-set of images (S3) from said newly-acquired images, wherein images in said third sub-set of images (S3) are consecutive and have the same most similar image in said first sub-set of images (S1), wherein a set of similarity levels is determined by comparing a given image in said newly acquired images with each image of said first sub-set of images (S1), and wherein said most similar image has the largest similarity level in said set of similarity levels. A second step of selecting (106) a given image in said third sub-set of images (S3) as a second reference image (I2). A step of calculating (107) the displacement between said second reference image (I2) and said first reference image (I1). The invention also relates to a corresponding system of displacement calculation.

The invention discloses a sealing device and method for a microcosmic displacement model injection and production opening. The sealing device comprises a main shaft, wherein a liquid channel is formed inside the main shaft and connected with a fluid injection pipeline, the first end of the main shaft is a cylinder with a small diameter and in threaded connection with a sealing head which can generate radial deformation when bearing axial pressure, the second end of the main shaft is a cylinder with a large diameter, a platform shoulder portion is formed on the main shaft, an outer barrel is arranged outside the cylinder, with the small diameter, of the main shaft, the first end of the outer barrel abuts against the sealing head, a certain distance exists between the second end of the outer barrel and the platform shoulder portion of the main shaft, a sleeve type end cap is arranged outside the second end of the outer barrel and the second end of the main shaft in a sleeving mode, an annular closed space is formed among the inner wall of the sleeve type end cap, the second end of the outer barrel and the platform shoulder portion, and through holes are formed in the side wall of the sleeve type end cap and connected with a micro hydraulic pump through a pipeline. The sealing strength of the sealing device can be manually adjusted, the sealing device is reliable in sealing performance and high in anti-corrosion capacity and abrasion resistance, and sealing parts do not need to be regularly replaced.

The invention discloses an image super-resolution reestablishing method based on a sub pixel displacement model. First, input images are configured into a grid, and an image with pixels distributed evenly is formed; then, the sub pixel displacement model is provided, so that a new image degradation model is established; then, a displacement estimation algorithm based on gradients is designed to estimate sub pixel displacement quantity, and accordingly a displacement kernel function is established and computed; and finally, according to the new image degradation model, the displacement kernel function and a Taylor series extension rule are used for establishing a kernel regression estimation expression, and accordingly a high-resolution image is reestablished. According to the method, two independent links of interpolation resampling and restoring in kernel regression super-resolution reestablishing are integrated, and the complexity of substep modeling and the ill-posedness of deconvolution are avoided. Meanwhile, the method does not limit the number of observed images, the method can be used for single-frame reestablishing and multi-frame reestablishing, and applicability is enhanced.

The invention discloses a method, device and system for actively controlling vibration of a linear motor and electronic equipment. The method comprises the following steps of acquiring an input signal for driving the linear motor; capturing the input signal within a set time as a signal to be analyzed; analyzing frequency points to be processed of the signal to be analyzed within a set frequency range and a voltage corresponding to each frequency point to be processed; obtaining an amplitude under a reference voltage corresponding to each frequency point to be processed according to a displacement model of a corresponding relation between the known reflection frequency and the amplitude under the reference voltage; calculating to obtain that the sum of the amplitude corresponding to each frequency point to be processed does not exceed a voltage amplification factor of maximum safety amplitude according to the maximum safety amplitude of the linear motor, the voltage corresponding to each frequency point to be processed and the amplitude under the reference voltage; sending an adjustment instruction comprising the voltage amplification factor to an amplifier for gain adjustment. Therefore, the highest vibration strength can be output possibly on the premise that the motor safety can be ensured.

The invention discloses an electrical impedance tomography method based on a gridding displacement model, which overcomes the shortcoming that after a to-be-detected body deforms, the electrical impedance tomography quality for the to-be-detected body is poor in the prior art. The electrical impedance tomography method based on the gridding displacement model includes following steps: (1) obtaining the limit-element gridding displacement model via the to-be-detected body, acquiring data of the to-be-detected body, and calculating differential voltage signals according to the acquired data; (2) calculating a conductivity change approximate value of the to-be-detected body; and (3) displaying the calculated value in the limit-element gridding displacement model. A displayed image is a real-time differential image of the to-be-detected body. The electrical impedance tomography method utilizes the limit-element gridding displacement model to correct structural deformation of total regions of the to-be-detected body. Compared with the prior art, the electrical impedance tomography method has the advantage that the tomography quality is obviously improved.

The invention relates to a centrifugal model retaining wall test device, belonging to the research technical filed of soil pressure centrifugal model test. The device comprises a driving system, a model retaining wall structure, a measurement system and a displacement automatic control system of model retaining wall. The added displacement automatic control system of model retaining wall can guarantee the model retaining wall to be remained at rest during centrifugal acceleration is increased; by adopting an electric motor as the driving system, the displacement of the model retaining wall can be guaranteed to be slow, homogeneous and continuous, and a data acquisition system can be guaranteed to completely record a change process of soil pressure and soil body displacement field during the model retaining wall moves; and an improved structure of the model retaining wall leads the model retaining wall to keep translatory displacement model. The preliminary experimental result shows that the device has stable capability, reliable operation and convenient operation, and is suitable for the research of the rest condition of the rigid retaining wall and the soil pressure of a driving side.