30 results about "Chirality" patented technology

Nanostructured chiral microparticles with bowtie shape having widely variable pitch, size, thickness and length are provided. The self-limited assembly of anisotropic building blocks makes possible high synthetic reproducibility, size monodispersity and computational predictability of their geometries for different assembly conditions. They display multiple strong circular dichroism peaks originating from absorptive and scattering phenomena. Unlike classical chiral molecules, these particles display a continuum of Osipov-Pickup-Dunmur chirality measures that exponentially correlate with the spectral positions of the circular dichroism peaks. Bowtie particles with variable polarization rotation were utilized in printing photonically active metasurfaces with spectrally tunable positive / negative polarization signatures for light detection and ranging (LIDAR) devices.

The invention relates to a quaii-BIC chiral metasurface device based on refractive index modulation and a preparation method and application thereof.The chiral metasurface device comprises a plurality of sub-wavelength structure partitions which are sequentially arranged along the X axis, and every two adjacent sub-wavelength structure partitions are rotationally and symmetrically arranged relative to the Y axis; a sub-wavelength structure in the sub-wavelength structure partition comprises at least two optical dielectric layers which are stacked along the Z axis, at least one sub-wavelength structure in the sub-wavelength structure partition is obliquely arranged relative to the Y axis, and a refractive index difference exists between the at least two optical dielectric layers, so that the metasurface device realizes intrinsic chirality. The metasurface device realizes tunable strong intrinsic chirality at multiple wavelengths, and the preparation method has the advantages that the processing difficulty is low, the thickness of the optical dielectric layer is low, the thickness and the inclination angle of the optical dielectric layer do not need to be accurately controlled, the lift-off process is compatible, and high-precision large-area metasurface device preparation can be realized.

The invention belongs to the technical field of optics, and relates to a vortex laser capable of regulating spiral chirality. The invention aims to solve the problem that single chiral output cannot be realized due to degeneration of a + / -l topological charge vortex mode in a resonant cavity in the prior art. The vortex laser comprises a pumping source, a gain crystal, a concave mirror, an output coupling mirror and an adjustable scattering sheet arranged in a cavity, a non-periodic SiO2 nano-particle film is arranged on the surface of the scattering sheet, the transverse position of the scattering sheet is adjusted through a two-dimensional translation platform, mode symmetry is broken through differential loss generated by interaction of + l and-l vortex light beams and a random scattering structure, and active, continuous and reversible regulation and control of spiral chirality are achieved. The output coupling mirror is provided with a central micropore to select vortex mode oscillation and output, and astigmatism conversion and CCD detection are matched to accurately judge the chirality of an output light beam. The scheme is compact in structure, high in stability and suitable for the fields of optical tweezers, quantum communication, super-resolution imaging and the like.

1. Name of the product in this design: Smart Glasses Temples. 2. Purpose of this design: The rear end component of a detachable eyeglass temple can be used as a regular eyeglass temple or as a smart wearable device integrating multiple functions such as headphones, photography, health monitoring, information display, and navigation to meet the wearing needs of various scenarios such as sports and health, business and social interaction. It is worn on the ear by plugging into an external product (detachable eyeglass temple). 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design highlights: 3D view of component 1. 5. Other situations requiring explanation: (1) The left and right temples are chiral symmetrical, that is, they are mirror images of each other but cannot overlap; (2) The left and right temples are components, that is, they are used together; (3) Based on the above chiral symmetrical relationship, other views of component two are omitted. 6. Other situations requiring explanation: The usage status is shown in Figure 1-9, which represents the different states of connection and disconnection between the protected product (solid line) and another product (dashed line) that is not protected. 7. Other situations requiring explanation: The solid line represents the part that requires protection.

The application discloses an anti-interface rough scattering quantum cascade laser active region and a preparation method thereof. The application forms a topological interface state protected by chiral symmetry as a lasing upper energy level at the butt joint interface between a first superlattice region and a second superlattice region, the wave function of the topological interface state is strictly zero in the thick barrier center and the interface, thereby the non-radiation loss caused by the interface roughness scattering is inhibited from the root, and the upper energy level carrier lifetime is significantly prolonged. Based on this, the threshold current density of the quantum cascade laser is greatly reduced, and high-efficiency lasing of 10 μm wavelength can be realized at room temperature. Meanwhile, a mixed epitaxy process combining molecular beam epitaxy and metal organic chemical vapor deposition is adopted, the nanometer precision energy band design of the core active region is ensured, and the efficient growth of the thick film waveguide layer is realized, which is beneficial to the practicalization and large-scale preparation of the device.

The application provides a chiral metasurface optical device, a preparation method thereof and an ultrafast circularly polarized light modulation method, the chiral metasurface optical device comprising a substrate and a chiral oligomer nanosuper surface structure arranged on the substrate, the chiral oligomer nanosuper surface structure being formed by a plurality of short-range ordered distribution of structural identical metal nanometer units; the metal nanometer unit comprises six metal nanometer discs, and the centers of the six metal nanometer discs are located on the circumference of a same circle; the structural chiral characteristic is introduced through the circularly distributed metal nanometer discs, the structure is simple, and the circularly polarized light modulation capacity is strong; through the combination of an excitation light source and a detection light source, the optical characteristic of the chiral metasurface optical device is excited on an ultrafast time scale, and a transient circular dichroism signal is realized; by changing the incident direction of the excitation light source and the detection light source, the sign of the transient circular dichroism signal can be reversed, and the chiral metasurface optical device has an ultrafast response time and a relaxation time.

The invention discloses a chiral metasurface construction method based on rotation transformation, a metasurface device comprises a substrate and a chiral metasurface located on the substrate, and the chiral metasurface is a rectangular nanorod array arranged periodically. The metasurface unit is composed of rotating rectangular silicon nanorods, and selective regulation and control of spin angular momentum of incident light are achieved by introducing in-plane mirror symmetry of a geometric rotation destroying structure. Simulation results show that the metasurface shows remarkable circular dichroism at the resonant wavelength of 633 nm, the transmissivity of the metasurface to left-hand circularly polarized light reaches up to 73%, and meanwhile the transmissivity of right-hand circularly polarized light is restrained to 2%. The device has the advantages of compact structure, easiness in integration and the like, and is expected to provide an effective solution for chiral biosensing application.

The application belongs to the cross field of coordination chemistry and nanomaterials, and discloses a super-stable strong luminescent N-heterocyclic carbene-protected chiral heterometallic cluster and a preparation method thereof. 58.5 H 59 AuBr4ClCu4F6N8OP (abbreviated as: R / S -NHC py -AuCu4 ‑ Br) belongs to an orthorhombic system, and the space group is a chiral space group P 212121. Another chemical formula of the nanocluster is C 58 H 58 AuCu4F6I4N8P (abbreviated as: R / S -NHC py -AuCu4 ‑ I) belongs to an orthorhombic system, and the space group is a chiral space group I 41. The cluster has a structure that can be stable to 150 DEG C in air. R / S -NHC py -AuCu4 ‑ Br has strong orange luminescence at room temperature in air, and the luminescence quantum yield is 58%. The chiral structure and strong luminescence make it have strong chiral luminescence characteristics, and it can have good application prospects in the fields of holographic projection, information storage and cell imaging.

Methods and systems for detecting chiral characteristic of an analyte, are provided. In some embodiments, the method disclosed herein (e.g. operated by a system) comprises receiving at least one spectral line of harmonic emission generated by an interaction between a laser field and the analyte; measuring a characteristic of an electric field of the at least one spectral line resulting from an electric dipole interaction between the laser field and the analyte; and determining the chiral characteristic of said analyte based on said measured characteristics of the at least one spectral line.

The application belongs to the technical field of light emitting diodes, and discloses a high-polarization circularly polarized light emitting diode, a preparation method and application thereof. The circularly polarized light emitting diode comprises, from bottom to top, a bottom reflective electrode arranged on the surface of a first substrate, a light emitting unit, a top transparent electrode, and a Bragg reflection layer. The material for preparing the Bragg reflection layer is cholesteric liquid crystal. The bottom reflective electrode and the Bragg reflection layer form a Bragg-mirror reflection microcavity structure, and the Bragg reflection layer selectively reflects and outputs circularly polarized light with the same chirality. The Bragg-mirror reflection microcavity is used for chirality selection, and the microcavity structure reverses the optical rotation of light with non-target optical rotation, thereby breaking through the problem of serious light loss of a traditional external polarizer. The microcavity structure utilizes the Bragg-mirror reflection optical microcavity polarization regulation mechanism, so that the light emitting diode does not depend on the intrinsic chirality, spin polarization or special orientation of the light emitting material, and can be applied to various light emitting systems.

The application relates to a reconstruction method and a reconstruction system of a non-hermitian system eigenstate, and the reconstruction method comprises the following steps: constructing an n-order non-hermitian system, wherein n is an integer greater than or equal to 2; coupling a driving source to the n-order non-hermitian system, and transforming an equivalent Hamiltonian of the n-order non-hermitian system with external excitation into an anti-PT symmetric form by using a suitable unitary transformation; calculating eigenvalues of the n-order non-hermitian system based on the equivalent Hamiltonian of the anti-PT symmetric form, finding a critical condition corresponding to a chirality inversion between two types of EPs in the n-order non-hermitian system; and adjusting the size of the excitation coupling coefficient based on the critical condition, so as to realize the chirality inversion between the two types of EPs. The application can actively manipulate the eigenstate of the EP without changing the physical structure of the non-hermitian system.

This invention belongs to the interdisciplinary field of coordination chemistry and nanomaterials, and discloses an ultrastable, strongly luminescent N-heterocyclic carbene-protected chiral heterometallic cluster and its preparation method. This invention utilizes multidentate chiral... R / S -NHC ql A well-designed and modular construction strategy using the -PF6 ligand resulted in a highly stable chiral heterometallic cluster, which remains stable in air up to 200°C. The chemical formula of this enantiomeric cluster is: C 74 H 66 AuCu4F6I4N8OP (abbreviated as: R / S -NHC ql -AuCu4 ‑ I), belongs to the orthorhombic crystal system, and its space group is chiral space group. P 21212. This cluster exhibits strong orange luminescence at room temperature with a luminescence quantum yield as high as 93%. It possesses advantages such as ultra-high photoluminescence quantum yield with thermally activated delayed luminescence characteristics, microsecond lifetime at room temperature, circularly polarized luminescence, and good solubility, radiation resistance, and high-temperature resistance. The external quantum efficiency of the CP-OLED prepared by solution processing reaches as high as 20.8%, opening up new avenues for developing novel solution-processable cluster-based CP-OLEDs.

Materials and devices, such as microfluidic devices and isolation columns (e.g., spin-columns for centrifuges or syringe-fed columns), are provided for detecting, analyzing, and / or separating biomolecules. A plurality of hedgehog-shaped particles that exhibits a multiscale chirality can be used in an active or sensing region of a device. Each hedgehog-shaped particle comprises a core region and a plurality of projections connected thereto. Each hedgehog-shaped particle comprises a material selected from the group consisting of gold (Au), silver (Ag), copper (Cu), and combinations thereof and an amino-acid derived chiral moiety. One or more target analytes associate with the plurality of hedgehog-shaped particles, for example, in the active region of a device, in the absence of any added targeting moiety to indicate the presence of, analyze, and / or separate the one or more target analytes. Methods of detecting or separating a target analyte in a biological fluid sample are also provided.

The invention provides a bi-material negative Poisson's ratio energy absorption structure embedded with a chiral structure and a preparation method, and belongs to the technical field of energy absorption structures and material design, the bi-material negative Poisson's ratio energy absorption structure comprises a multi-cell structure, and the multi-cell structure is prepared through array arrangement and out-of-plane stretching of a negative Poisson's ratio basic structure; the negative Poisson's ratio basic structure is constructed by arranging unit cell structures in a mirror symmetry mode, each unit cell structure comprises a chiral structure and a curved-edge inward-concave structure, the chiral structures are embedded in the curved-edge inward-concave structures, and the chiral structures and the curved-edge inward-concave structures are made of different materials. According to the structure, by introducing a negative Poisson's ratio structure of a chiral unit and a curved-edge inward-concave structure and combining the synergistic deformation characteristic of double materials, the problems that an existing energy absorption structure is low in energy absorption efficiency, poor in structural stability, insufficient in controllable deformation performance and the like in the collision process are solved; and efficient and controllable energy absorption and structure buffering performance in the collision process are achieved, and wide engineering application prospects are achieved.

The present application relates to the technical field of chiral inositol, in particular to a chiral inositol crystal form and a preparation method thereof, wherein the chiral inositol crystal form has characteristic diffraction peaks at diffraction angles 2theta of 13.44±0.02°, 14.85±0.02°, 16.58±0.02°, 17.75±0.02°, 19.43±0.02°, 22.79±0.02°, 23.70±0.02°, 24.79±0.02°, 25.90±0.02°, 27.05±0.02°, 28.66±0.02°, 30.11±0.02°, 30.77±0.02°, 34.66±0.02°, 37.776±0.02°, 39.46±0.02°, 40.73±0.02°, 44.78±0.02° and 46.52±0.02°, as measured by X-ray powder diffraction analysis using Cu-Kα rays, and has high thermal stability and is more widely applicable.

The invention relates to the technical field of organic synthesis and chiral optics, and discloses a chiral optical material based on expanded porphyrin and a preparation method of the chiral optical material. The chiral optical material based on expanded porphyrin has a general formula I or a configurational isomer of the general formula I, wherein n is 1 or 2, M is Ni, Pd or Pt, and Mes is 2, 4, 6-trimethylphenyl, and is shown in the description. According to the chiral optical material based on expanded porphyrin, expanded porphyrin containing a plurality of aromatic rings on a conjugate loop is taken as a core, and the expanded porphyrin has stable chirality and chiral optical response of a near-infrared second region due to extension of a pi system and a synergistic effect among a plurality of spiral chiral centers.

The application relates to a quasi-BIC chiral metasurface device based on refractive index modulation and a preparation method and application thereof. The chiral metasurface device comprises a plurality of sub-wavelength structure partitions arranged sequentially along an X axis, and two adjacent sub-wavelength structure partitions are arranged in rotational symmetry relative to a Y axis. The sub-wavelength structure in the sub-wavelength structure partition comprises at least two optical medium layers arranged in a stack along a Z axis. At least one sub-wavelength structure in the sub-wavelength structure partition is arranged in an inclination relative to the Y axis, and there is a refractive index difference between the at least two optical medium layers, so that the metasurface device realizes intrinsic chirality. The metasurface device of the application realizes tunable strong intrinsic chirality at multiple wavelengths. The preparation method has the advantages of low processing difficulty, low thickness of the optical medium layer, no need for precise control of the thickness and inclination angle of the optical medium layer, compatibility with the lift-off process, and realization of high-precision large-area metasurface device preparation.

Nanostructured chiral microparticles with bowtie shape having widely variable pitch, size, thickness and length are provided. The self-limited assembly of anisotropic building blocks makes possible high synthetic reproducibility, size monodispersity and computational predictability of their geometries for different assembly conditions. They display multiple strong circular dichroism peaks originating from absorptive and scattering phenomena. Unlike classical chiral molecules, these particles display a continuum of Osipov-Pickup-Dunmur chirality measures that exponentially correlate with the spectral positions of the circular dichroism peaks. Bowtie particles with variable polarization rotation were utilized in printing photonically active metasurfaces with spectrally tunable positive / negative polarization signatures for light detection and ranging (LIDAR) devices.

The invention relates to the technical field of chiral workpiece attitude control, and discloses a chiral workpiece attitude control method supporting multi-scene application, which comprises the following steps: receiving a CAD model of a new workpiece, analyzing geometric characteristics, determining chiral symmetry information, and generating a corresponding mirror image model as a chiral template; constructing parameter templates of different workpiece types, determining the workpiece types of the chiral template, and performing dynamic adaptation in combination with the parameter templates to obtain parameter configuration information; a plurality of candidate postures of the chiral template are generated, key point locations are marked according to task requirements, posture configuration rules are generated, the candidate postures are screened, and the optimal posture is determined; according to the method, the workpiece attitude data is obtained, whether the attitude adjustment instruction is generated or not is judged by combining the optimal attitude, the dual-channel feature extraction result and the parameter configuration information, the problems that in the prior art, model processing precision is insufficient, parameter adaptability is poor, the optimal attitude is difficult to determine, adjustment is not timely and the like are solved, and the stability and efficiency of the manufacturing link are improved.

Systems and methods for separating chiral objects in a mixed solution are provided. In some aspects, a method includes providing a separation device with a mixed solution of chiral objects comprising a first species of chiral objects and a second species of chiral objects. The method also includes directing an electromagnetic system positioned about the separation device to generate a time-dependent electric field excitation configured to selectively control a propulsion of chiral objects in the mixed solution to spatially separate the first species of chiral objects from the second species of chiral objects inside the separation device. The method further includes collecting spatially separated chiral objects from the separation device.

The invention relates to the technical field of microwave-millimeter waves, and provides a transmission-type broadband line-circular polarization converter of a mirror image staggered double-layer metasurface. The device is composed of two layers of chiral metal patterns and a 1.5 mm thin medium interval, wherein the two layers of chiral metal patterns rotate by 180 degrees relative to each other. When linear polarization electromagnetic waves in the y direction are vertically incident, right-handed circular polarization waves can be output within the frequency band of 11.97-18.50 GHz, the axial ratio is smaller than 3 dB, the bandwidth reaches 6.53 GHz, and the transmission ray-circular polarization conversion rate is larger than 90%. The axial ratio of the device is kept to be smaller than 3dB within the oblique incidence range of 0-30 degrees, and good angle tolerance is shown. The top layer-bottom layer chiral structure introduces an orthogonal component and a 90-degree phase difference through mirror image staggering, so that efficient transmission-type polarization rotation is completed. The broadband circularly polarized transmission wave antenna has the advantages of few layers, small thickness, excellent low profile, light weight and integration, and can be widely applied to occasions requiring broadband circularly polarized transmission waves, such as 5G / 6G communication, vehicle-mounted radar, satellite links and imaging systems.

The invention discloses a chiral ultra-slow light all-dielectric metasurface based on a continuous domain bound state and an implementation method thereof, and belongs to the technical field of metamaterials and photonics. The metasurface comprises a high-refractive-index dielectric substrate and unit structures periodically arranged on the high-refractive-index dielectric substrate, and each unit structure comprises at least two sub-wavelength holes. In an undisturbed state, the unit structure has high symmetry so as to support the BIC with symmetric protection. Structural disturbance (such as size change or inclination angle change) is introduced into the hole to break the symmetry, so that the BIC is converted into a quasi-BIC, and two polarization singular points with opposite chirality are formed in a momentum space. According to the invention, the topological characteristics of the BIC are ingeniously utilized, huge external and internal chiral responses (CD value is close to 1) can be realized under oblique incidence and normal incidence respectively, a remarkable spin-dependent slow light effect is generated, and the group delay of one spin state can be up to microsecond magnitude. The invention provides a novel efficient and flexible chiral light regulation and control scheme which has important application value in the fields of polarization communication, quantum photonics and the like.

The present application relates to the field of chiral negative Poisson's ratio energy absorption structure, and discloses a preparation method of chiral compression-torsion negative Poisson's ratio structure, which can be used for the theoretical analysis of the construction of relatively complex curve profiles through Lagrange interpolation method, is beneficial to be applied to some occasions with relatively complex structure requirements, and is simple in construction mode, improves production efficiency, and changes the positive and negative Poisson's ratios of the structure in the application through the design of the oblique rod and the torsion direction of the chirality, when the torsion directions of the uppermost layer of the chiral structure of the chiral torsion columns at the four corners are opposite in turn, the structure presents negative Poisson's ratio compression, and when the torsion directions of the uppermost layer of the chiral structure of the chiral torsion columns at the four corners are the same in two directions and opposite in two directions in turn, the structure presents positive Poisson's ratio compression.

The invention relates to the technical field of transaction audit checking, in particular to a multi-source data fusion enterprise associated transaction audit intelligent checking system which comprises a data acquisition module, a network construction module, a chiral feature generation module, a feature injection module, a test distribution module, a distribution calculation module and a statistical test module. The chiral feature generation module is used for generating a plurality of chiral feature pairs based on the transaction data, each chiral feature pair comprises a left-hand feature and a right-hand feature, and the left-hand feature and the right-hand feature are equivalent in three dimensions of transaction amount, transaction category and transaction quantity; by setting a chiral feature pair and injecting a test transaction which is completely equivalent in commercial essence and is only in mirror symmetry in microscopic features into a normal transaction stream, a ghost agency can be effectively induced to expose systematic preference of the ghost agency in a coordination behavior, so that the ghost agency is identified from massive noise, and the accuracy of the ghost agency is improved. And effective detection of the ghost medium with extremely high concealment is realized.

The utility model relates to a pair of 3D (three-dimensional) polarized glasses based on chiral gold nanoparticle sub-lens coating. Circularly polarized light splitting is realized by directionally depositing a levorotatory gold nanoparticle functional layer and a dextrorotatory gold nanoparticle functional layer on the surfaces of a left lens and a right lens respectively. The diameter of the chiral gold nanoparticle is about 200nm, the surface of the chiral gold nanoparticle is modified by L / D-cysteine to form a multi-branch star-shaped structure, and a plasma formant of the chiral gold nanoparticle covers a 500-750nm wave band and is accurately matched with the polarization wavelength of a 3D display system; and mirror symmetry circular dichroism signals with peak values of 45 mdeg are generated at the positions of 569 nm and 699 nm. The left lens L-AuNPs layer selectively transmits left-handed circularly polarized light, the right lens D-AuNPs layer transmits right-handed light, and the CTAB micelle dispersion and silicon dioxide encapsulation layer design is matched, so that the light transmittance of the lenses and the crosstalk rate during 30-degree oblique incidence are reduced, and the polarization extinction ratio is increased. The problems that a traditional polarizing film is sensitive in visual angle and low in light splitting efficiency are solved.

The invention provides a double-spiral-structure micropore machining method and system based on a Bessel beam. The processing method comprises the following steps: performing high-frequency component elimination and beam-expanding collimation on a laser beam through a filtering and beam-expanding collimation module; light beams are adjusted through a light power and polarization direction adjusting module to generate polarized light; performing phase modulation on the light beam through a phase modulation module to enable the wavefront of the light beam to be of a spiral structure; the light beam is divided into two beams through a wavefront chiral mirror image module, the two beams are respectively reflected for a plurality of times, and one beam is added into a timeline to adjust time delay; the two paths of light beams are modulated through a Bessel light beam generation module to generate Bessel light beams, and then the Bessel light beams are combined; and the beam-combined light is focused through the light beam focusing module. By means of the machining method, the machining precision of the spiral structure micropores is improved.

A spin Hall shift of light-based chirality parameter detection method and system. The method comprises: acquiring the dielectric constant, the magnetic permeability and the radius of chiral nanoparticles under test; on the basis of the dielectric constant, the magnetic permeability and the radius, determining spin Hall shifts of light of chiral nanoparticles having different chirality parameters under duality symmetry conditions, and obtaining a mapping relationship between the spin Hall shifts of light and the different chirality parameters; using circularly polarized light to irradiate the chiral nanoparticles under test to generate a spin Hall effect of light; and under the spin Hall effect of light, adjusting the wavelength of incident light until duality symmetry is satisfied, and obtaining an optimal spin Hall shift of light; and on the basis of the optimal spin Hall shift of light and the mapping relationship, determining a chirality parameter of the chiral nanoparticles under test. The method effectively avoids the occurrence of a destructive effect, improves the capability to characterize near-field chiral information, and enables near-field chiral features to be captured and parsed more accurately and comprehensively.

The invention discloses a wavelength-controlled circular dichroism achiral metasurface and a design method thereof, and belongs to the technical field of electromagnetic wave phase and amplitude regulation and control. The wavelength-controlled circular dichroism achiral metasurface comprises a bottom-layer metal reflecting layer, a substrate dielectric layer, a middle structural layer, a top-layer dielectric layer and a top-layer structural layer which are sequentially stacked from bottom to top, each of the middle structure layer and the top structure layer is composed of a plurality of metastructure units which are periodically arranged, the period length of each metastructure unit is sub-wavelength, and each metastructure unit is of a triple rotational symmetry structure; an achiral structure is adopted by the super-structure surface, the structure is symmetrical, geometric parameters needing to be optimized are fewer, the regulation and control mechanism is more visual, the machining tolerance is high, and the working bandwidth is wider; a triple rotational symmetry structure is adopted as a super-structure unit, and the same surface unit structure of a super-structure plane comprises two triple rotational symmetry structures, so that the circular dichroism can be regulated and controlled by switching the wavelength of incident light.

The embodiment of the invention provides a chiral workpiece attitude compensation method and device based on symmetry judgment, and the method comprises the steps: obtaining a 3D model of a workpiece, automatically analyzing the geometric features of the model to recognize a chiral symmetry axis or symmetry plane, and generating a corresponding mirror image model as a chiral template; loading a structured parameter configuration file related to the workpiece type, wherein the structured parameter configuration file comprises a distance step length, an angle step length, a distance threshold value and a non-maximum suppression threshold value of the point pair features; defining an attitude selection rule based on a downstream task demand, wherein the attitude selection rule comprises marking and priority configuration of a grabbing point or an assembly reference point; executing dual-channel feature extraction, chirality discrimination and attitude compensation, and outputting a target workpiece attitude meeting task requirements; wherein chirality judgment and attitude compensation are based on symmetry judgment of a workpiece, feature similarity of an original model obtained in advance and a chirality template is compared, and transformation compensation is carried out on an estimated attitude. The system universality is improved, and the operation and integration difficulty is reduced.