140results about How to "Guaranteed interference" patented technology

Disclosed are a DMRS processing method and device. A base station side pre-allocates one or more sequence identifiers and / or bandwidth information for a terminal side via a UE dedicated high layer signaling, the sequence identifier and / or bandwidth information being required for generating a DMRS sequence; and then the base station side utilizes at least one of the following indication methods to indicate the terminal side specific sequence identifier and / or bandwidth information employed to transmit the DMRS sequence: 1. using a bit in a downlink control indication signaling for the indication; 2. using the position of scheduled time domain and / or frequency domain resources for the indication.

The embodiment of the invention provides a control method and device. The method includes the following steps that when a BBU determines that the network quality of a first cell in multiple cells which are covered by the BBU is reduced, the load information of the first cell is determined; when the load of the first cell is smaller than a first load threshold, the second cell which has the strongest signal interference with the first cell in adjacent cells of the first cell is determined according to the signal strength of RRUs; the RRU of the first cell is combined with the RRU of the second cell and a combined cell is obtained. By means of the control method and device, the network quality is improved and network experience of a user is improved.

The invention discloses a common-path digital holographic microscopic device and method based on optical grating defocusing. The device comprises a light source, a to-be-detected object, a microscopic object lens, a correction object lens, a first lens, a second lens, an image sensor, and a computer. The device also comprises a one-dimensional periodic optical grating and a hole array. Light emitted by the light source passes through the to-be-detected object, the microscopic object lens and the correction object lens to come to the first lens. An outgoing beam, formed after the first lens converges the light, passes through the one-dimensional periodic optical grating to be divided into zero-level diffracted light and +1-level diffracted light, and is filtered by the hole array to form reference light and object light. The reference light and object light pass through the second lens to be converged into a light beam, and the light beam is received by a light receiving surface of the image sensor. An image signal output end of the image sensor is connected with an image signal input end of the computer. The device is simple and practicable, and is convenient to adjust. Moreover, the size of a to-be-detected object is not limited, and the view field of a detection window is used fully. The device can greatly reduce the complexity in determining a system carrier frequency, and improves the phase recovery algorithm efficiency.

The invention discloses an online environment intelligent deployment system and method of a CTF online competition platform. The system includes an online competition platform server terminal, a reverse proxy server terminal, a virtual machine management platform server terminal and several virtual machines created by means of a virtual machine management platform and used for operating a question environment; the online competition platform server terminal is provided with an environment generation module and an environment recycling module, the virtual machines used for operating the question environment are created by means of the virtual machine management platform server terminal according to question configuration information, and port proxy is conducted through the reverse proxy server terminal so that the question environment virtual machines can be accessed through the public network IP and a port. According to the system and method, real-time intelligent deployment of the question environment is achieved through the virtualization technology, the question environment is accessed by deploying a reverse proxy on a limited public network address machine, at the same time, the Internet for the question environment is configured to be independent, it is ensured that the environment can be accessed and isolated, and the safety of other property is ensured.

The invention discloses a disturbance control method based on distributed wireless network architecture. The method comprises the following steps of: receiving a broadcasting signal transmitted by a second receiving terminal through a first transmitting terminal, acquiring disturbance power which can be tolerated by the second receiving terminal, and calculating an upper limit value of the transmitting power, wherein the signals are transmitted in the upper limit value of the transmitting power so that the second receiving terminal is not disturbed. Meanwhile, the first transmitting terminal acquires a lower limit value of the required transmitting power of the first receiving terminal, in which the receiving signals are prevented from being disturbed. In addition, the invention also provides corresponding equipment and a system. By the method, equipment and system provided by the invention, the disturbance of a communication link to the receiving signals of other communication links is in an acceptable range, and the disturbance of the other communication links is avoided.

The invention belongs to the field of wireless communication networks, and discloses a resource allocation method for D2D (Device-to-Device) communication in a cellular network and a system. The resource allocation method comprises the following steps: deciding whether to perform clustering or not according to the quantity of cellular users and the quantity of D2D users, and applying a distance-based clustering way if clustering is needed; sequentially selecting the D2D users to serve as master D2D users for executing a resource allocation way based on minimum interference together with the cellular users; and lastly, updating clusters, removing the D2D users who do not satisfy an interference condition from the clusters, performing communication with orthogonal resources, and calculatinga matching way with maximum throughput. The cellular users with minimum interference are always selected for the D2D users in each iteration, and a matching combination with maximum throughput is selected, thereby not only reducing the system interference, but also increasing the user throughput and the access number. A plurality of pairs of D2D users multiplex one cellular user, so that the spectrum utilization ratio is increased greatly.

The embodiment of the invention discloses a method and system for scheduling channel resources and a base station, which are applied to the technical field of communication. In the embodiment, the method comprises the steps of pre-scheduling user equipment corresponding to a downlink resource in at least one subframe by a base station first before scheduling an uplink resource so as to obtain pre-scheduled user equipment information, wherein the pre-scheduled user equipment information is referred to during scheduling the uplink resource; sending the scheduled uplink resource information to the scheduled user equipment by uplink authorization; calculating a downlink transmission weight of a NF (Null Forming) after receiving uplink channel information of the user equipment; scheduling a downlink frequency band of the user equipment to be a frequency band as same as the uplink channel information sent by the user equipment while at least one pre-scheduled subframe comes; and sending thedownlink resource information to the user equipment according to the calculated NF downlink transmission weight. According to the method in the embodiment, the interference between cells can be reduced and an effect of the NF on interference inhibition is improved.

The invention discloses a method for selecting wireless Mesh network transmitting power for a three-dimensional scene and equipment. The method and the equipment are used for determining the transmitting power of all nodes according to the positions of all the nodes in a network and the distances between all the nodes. The method includes the specific steps that at the beginning, all the nodes transmit signals at maximum power, and neighbor information is detected; a neighbor list is formed through the nodes according to the detected neighbor information, wherein the neighbor list comprises the distances between neighbor nodes, signal intensity and other information; the nodes upload the neighbor list of the nodes to a root node, and the root node grasps the position and the distance information of all the nodes in the whole network; the root node calculates an optimal transmitting power set of all the nodes in a centralized mode according to an overall performance trade-off model and an overall iterative optimization algorithm and gives a notice to all the nodes in the network; the nodes adjust the transmitting power of the nodes according to received power adjusting information from the root node. The invention further discloses the equipment capable of achieving a power selection scheme.

The invention relates to the field of wire-arranging technology of a multi-head wire-rewinding machine, in particular to a wire-arranging mechanism of the multi-head wire-rewinding machine and a numerical control wire-arranging method. The wire-arranging mechanism of the multi-head wire-rewinding machine comprises a stander, a PLC controller, a screw rod driving device, wire-arranging guide wheels, a reversing guide wheel and a wire-arranging guide wheel driving device, wherein the wire-arranging guide wheel driving device is connected with the wire-arranging guide wheels; the screw rod driving device comprises a screw rod, a screw rod nut, an approach switch, two screw rod bearing seats, two synchronous belt pulleys, a synchronous belt and a constant speed motor, wherein the screw rod nut is connected with the wire-arranging guide wheel driving device; the PLC controller is connected with the approach switch and the constant speed motor; and the PLC controller is provided with a forward rotation monitoring timer, a reverse rotating monitoring timer, a millisecond-level reversing timer and a speed increasing and reducing timer. The invention not only reduces the interference amongwires and the production accidents and improves the wire-arranging quality and finished product wire quality, but also simplifies the structure, is easy for operation and reduces the manufacturing and maintaining costs.

The invention discloses a dispatching method in a relay network, which comprises the following steps of: allocating a relay link resource to relay equipment by taking the relay equipment as a terminal of a base station; when the allocated relay link resource is a shared resource, dispatching the resource by using a centralized dispatching mode; when the allocated relay link resource is an orthogonal resource, receiving the shared resource occupancy rate which is reported by user equipment (UE); if the shared resource occupancy rate is less than a preset threshold, dispatching the resource by using a distributed dispatching mode and taking the shared resource as the access link resource; and otherwise, dispatching the resource by using the centralized dispatching mode. The method can be suitable for a complex wireless environment and a resource allocation mode after using the interference coordination technology; and a proper dispatching mode is chosen according to different scenes so as to reduce the expenditure of the signaling dispatching while ensuring interference suppression.

The invention provides a virtual machine migration method and device. The virtual machine migration method includes the steps that historical resource utilization data of physical machines are obtained, alarm data greater than preset standard thresholds and preset times are determined and are input into an autoregressive model adopted in a time sequence trend prediction method to obtain prediction values, the migrated probability of virtual machines in the alarm physical machines with the alarm data is obtained if the prediction values are greater than the preset thresholds, and the virtual machines to be migrated are selected based on the migrated probability and are migrated. The interference of other external complicated factors can be effectively reduced, SLA can be guaranteed, unnecessary virtual machine migration operation caused by explosive rise of the virtual machine resource usage rate can be avoided, the virtual machines in the alarm physical machines are migrated before overload of the alarm physical machines occurs, continuous uninterrupted normal operation of the alarm physical machines is ensured, the migration cost of the virtual machines can be effectively reduced, the resource utilization rate of the alarm physical machines after migration of the virtual machines can be ensured, and resource waste can be avoided.

The invention provides a vehicle control method, a device and equipment. The method comprises the steps: obtaining a reference track of a target vehicle, the feature information of the target vehicleat a current track point, and a kinetic model; according to the reference trajectory, the feature information and the kinetic model, determining a first control quantity of a target trajectory point using a model prediction controller, wherein the target trajectory point is the next trajectory point of the current trajectory point; determining a second control quantity of the target track point byusing a feedforward algorithm according to the feature information; according to the reference trajectory and the kinetic model, determining a third control quantity of the target trajectory point byusing a model reference adaptive control algorithm; and determining the target control quantity of the target track point according to the first control quantity, the second control quantity and thethird control quantity. In the embodiment of the invention, the robustness of vehicle control is effectively improved by adopting a mode of an MMC + FF + MRAC algorithm, so that the vehicle can stillquickly and stably track the reference trajectory under a special working condition.

The invention discloses cell switching methods and equipment. According to one cell switching method, a switching command that is sent by a radio network controller (RNC) to a terminal is expanded and thus the switching command not only carries an uplink physical channel (UpPCH) position information of a target cell main frequency point but also carries UpPCH position information of a target cell auxiliary frequency point, so that the UpPCH positions of the main frequency point and the auxiliary frequency point are different; and under circumstances that the target cell uses high speed uplink packet access (HSUPA) resources of the auxiliary frequency point, the terminal carries out uplink synchronization respectively at the main frequency point and the auxiliary frequency point. Meanwhile, according to the other method, UpPCH positions of a main frequency point and an auxiliary frequency point are adjusted into a same position; and under circumstances that a current switching command is not changed, UpPCH position information carried in the switching command is used to express the UpPCH position of the main frequency point and the UpPCH position of the auxiliary frequency point; and moreover, it is ensured that UpPCH interference of the main frequency point and the auxiliary frequency point at the UpPCH position are in a certain range, so that the terminal carries out uplink synchronization respectively at the main frequency point and the auxiliary frequency point. According to the invention, it can be avoided that uplink synchronization fails after HSUPA switching.

The invention provides a ground-penetrating radar device used for detecting a boulder in a single hole and a detection method thereof. The ground-penetrating radar device comprises a radar antenna, a ground-penetrating radar host, and a computer connected with the ground-penetrating radar host. The radar antenna comprises a transmitting element and a receiving element, which are connected with the radar host by leads. The receiving element is disposed on the upper part or the lower part of the transmitting element. A distance between the transmitting element and the receiving element is at least one meter. The transmitting element and the receiving element are fixedly integrated into one body by adopting non-metal materials, and an electromagnetic wave transceiving device is formed. The ground-penetrating radar device is advantageous in that the radar antenna is inserted in a drill hole, and is cooperated with the ground-penetrating radar host and the computer to detect the boulder on the periphery of the drill hole (a radius is within 5meters), the size of the boulder, and the distance between the boulder and the drill hole accurately, and the ground-penetrating radar device can be used for a tunneling project.

An embodiment of the present application provides a housing assembly, comprising a first housing, a second housing and a rotating shaft, wherein the first housing and the second housing are rotatablyconnected with each other through the rotating shaft; At least two radiator are arranged on that rotate shaft, the first shell and the second shell are both provided with radiators, and when the firstshell and the second shell are in a folded state, the radiator on the first shell and the radiator on the second shell are staggered. when the first housing and the second housing are in the folded state, the radiators on the electronic device do not overlap each other, which can reduce the interference between each radiator and improve the radiator performance. The requirement of multi-antenna design of electronic equipment can be realized.

A mechanical multi-frame RF / infrared composite interference semi-physical simulation system includes a microwave anechoic chamber, a three-axle table, a table control system, a RF interference simulator, an infrared interference simulator, a mechanical multi-frame moving system, a servo system, and an integral real-time simulation control system. The three-axle table, the table control system, the RF interference simulator, the infrared interference simulator, and the mechanical multi-frame moving system are arranged inside the microwave anechoic chamber, and the integral real-time simulation control system is arranged outside the microwave anechoic chamber. The RF interference simulator and the infrared interference simulator are mounted on a moving platform of the mechanical multi-frame moving system. The integral real-time simulation control system is composed of a multi-node real-time computer network including a master control computer, an acquisition computer, a RF interference control system, an infrared interference control system, a real-time communication network, a simulative master control system and a monitoring system. The real-time communication network is built up by the utilization of reflective memory networking, and information transmission and real-time control among devices of the simulation system are realized.

The invention discloses a device and method for detecting a fuse mounting position of a vehicle body control module. The detecting device comprises a base and supporting columns vertically arranged on the base, the supporting columns are arranged at the two ends of the base, cross arms are arranged on the two supporting columns, the two ends of each cross beam are mounted on the different supporting columns respectively, a camera fixing plate is arranged on one sides of the cross arms, a camera is arranged on the tail portion of the camera fixing plate, and an LED light source is arranged on the other sides of the cross arms. A vehicle body control module locating column used for fixing the vehicle body control module is arranged at the position, below the camera, on the base. The detecting device further comprises a control and display box used for displaying whether the fuse mounting position is correct or not. The device for detecting the fuse mounting position of the vehicle body control module of the special structure enables the controlled vehicle body control module and the camera to be connected and fixed to be a mechanical whole through a mechanical device, the interference from outside vibration can be effectively prevented, and test reliability is improved.

The invention provides an antenatal training device and fetus-voice meter integrated machine. The machine comprises a fetal heart signal acquisition device and a fetal heart signal extraction device, wherein the fetal heart signal acquisition device is used for sending out antenatal training voice signals and acquiring heartbeat sound signals sent out from the body of a pregnant woman at an interval of the antenatal training voice signals; the fetal heart signal extraction device receives the heartbeat sound signals acquired by the fetal heart signal acquisition device and separating fetal heart signals from the heartbeat sound signals, and the separated fetal heart signals are sent to a background server to be analyzed or displayed and primarily diagnosed at the local end; the fetal heart signal acquisition device adopts a bone conduction microphone and receives the heartbeat sound signals passively. The machine can monitor the heartbeat of a fetus while performing antenatal training on the fetus, acquires the fetal heart signals through the bone conduction microphone, cannot harm human bodies due to the fact that the fetal heart signals are received passively in the whole acquisition process and is safe and high in practicability.

The invention discloses an integrated wheel and a corresponding electric vehicle. The integrated wheel comprises a hub and a wheel cover, wherein a shaft core and an external tooth ring are arranged on the hub, and a controller, a motor, a power transmission mechanism, a pair of bearings, a fixing frame, a charging assembly and a ratchet wheel assembly are arranged on the shaft core; the controller is connected with the motor, the charging assembly and the ratchet wheel assembly; the motor is connected with the power transmission mechanism; the power transmission mechanism is connected with the external tooth ring, and the hub and the wheel cover are respectively connected with one bearing; a battery assembly is arranged on the fixing frame and connected with the controller and the motor. The integrated wheel disclosed by the invention is exquisite in design, simple to operate, balanced and stable in power transmission and high in efficiency; all electric components are convenient and easy to wire and thread, so that interference caused by rotation on wiring is avoided, and the operating efficiency and the stability of connection among all the components are greatly improved; the integrated wheel is convenient to charge, and besides the hollow shaft core is also favorable for heat conduction and heat dissipation, so that the heat dissipating efficiency is improved. The integrated wheel disclosed by the invention can be suitable for various types of bicycles and various types of electric vehicles and is good in adaptability and wide in application range.

The invention discloses an improved weighted graph-based super dense heterogeneous network interference coordination method. With maximizing the network spectrum efficiency as a target and in a condition of ensuring a changed rate request along with changes of a service type for cell users, cells are firstly clustered according to cell interference environments in the actual super dense heterogeneous network scene; a user interference weighted graph is built in each cell cluster, users in the cluster adopt a low-complexity dynamic sub-channel multiplexing method, the method joins cell clustering and user clustering, and a weighted interference graph is built for the user. The purposes of increasing the network spectrum efficiency and reducing the interference are realized, the low complexity and good convergence performance are realized, the interference problem in the whole network is converted to the interference problem in each small cell cluster, the interference problem is simplified, interference in the network is suppressed on the basis of ensuring the user rate, and the maximization of the network spectrum efficiency is realized.

The invention discloses application of a CdTe QD@ZIF-8 core-shell nano composite material in detection of oxidase activity, the CdTe QD@ZIF-8 core-shell nano composite material has the advantages of size selection, good stability and good dispersibility of solution, and the synthetic method has simplicity, mild conditions and short time. According to the application of the CdTe QD@ZIF-8 core-shell nano composite material in detection of oxidase activity, the reaction product H2O2 of oxidase with a corresponding substrate can penetrate through a material shell to react with CdTe QD, other molecules greater than the pore diameter of the shell are obstructed, so that difference in fluorescence signals is generated, and the content of oxidase in a system can be detected by fluorescence spectrophotometry; the operation is simple, and the used detection reagent greatly reduces the interference of background fluorescence to the detected system, so that the detection precision is ensured; and the application of the CdTe QD@ZIF-8 core-shell nano composite material has the advantages of high sensitivity, strong antijamming capability, good stability and convenience in use and operation on a fully automatic biochemical analysis instrument as compared with double reagents.

The invention discloses a block stator press-fitting shell device. The device comprises a banding ring, an upper template, a middle template, a lower template, guide columns, guide sleeves, an upper pressure head, a lower pressure head, a limiting block, a bolt and a nut, wherein guide sleeve holes are formed in the upper template, the middle template and the lower template; the guide sleeves arearranged in the guide sleeve holes; the guide columns can slide up and down on the guide sleeves; a positioning hole is formed in the middle of the middle template; the upper pressure head extends upwards from the inside of the positioning hole of the middle template; the bottom of the upper pressure head is fixedly connected with the middle template; the bottom of the lower pressure head is fixedly connected with the middle of the lower template; the limiting block is connected with the lower template; a stop hole groove of the upper pressure head is used for placing a shell; and a stop holegroove of the lower pressure head is used for placing a stator sleeved with the banding ring. According to the device, the roundness requirements of the stator can be met; the magnitude of interference of the assembled stator and shell can be guaranteed, so that the assembling quality of the motor is high; for different products, only the upper pressure head and the lower pressure head need to bereplaced, so that the different products can be used on the same device; and the operation is simple, the production efficiency is high, and batch production is facilitated.

The invention provides a three-field of view digital holography detection device and a method based on a two-dimensional phase grating and point diffraction. The device comprises a light source (1) with an emergent wavelength to be lambda, a first polarizer (2), a collimating beam expansion device (3), a measurement window (4), a to-be-detected object (5), a first lens (6), the two-dimensional phase grating (7), a hole array (8), a second polarizer (9), a third polarizer (10), a fourth polarizer (11), a second lens (12), a diaphragm (13), an image sensor (14) and a computer (15). Field of view translation and frequency domain separation are realized through two-dimensional phase grating splitting and carrier introduction, interference of three object light beams can be avoided through the polarizer group, and reduction of crosstalk between spectra is realized. The method is simple and easy to operate, the adjustment is convenient, and the field of view use rate of the image sensor is high; a hologram carrier frequency mapping relation is simple, accurate control can be realized through grating defocus, the system carrier frequency determination complexity is low, and the phase recovery algorithm efficiency is high.

The invention relates to an intelligent low-voltage power capacitor comprising a capacitor body with a capacitor core and a control unit. The control unit consists of a circuit breaker, a voltage and current signal acquisition circuit, a switching mechanism and a single-chip microcomputer. A signal filtering and shaping circuit, an A / D conversion unit, a logic protection calculation unit, a zero-crossing capturing circuit and a zero-crossing switching control unit are arranged inside the single-chip microcomputer in an integrated mode. The logic protection calculation unit including a logic operation module, a storage module and a comparison module is used for calculation to obtain a voltage, a current, an active power, a reactive power, a power factor, and a harmonic quantity and controlling the zero-crossing switching control unit to execute capacitor core cutting for the switching mechanism when the voltage, current and harmonic quantity exceeds standards, thereby realizing over-voltage, under-voltage, and harmonic protection. Therefore, on the basis of reactive compensation logic, the switching mechanism is controlled to execute zero-crossing switching based on zero-crossing determination, thereby realizing reactive compensation. According to the intelligent low-voltage power capacitor provided by the invention, harmonic, voltage and current protection is realized based on the logic operation of the single-chip microcomputer; and the intelligent low-voltage power capacitor has advantages of complete protection functions and compact structure.

The invention discloses a double-coil four-string restrict constant current steel chord self-excited excitation circuit, which comprises an induction coil L1 and an excitation coil L2, characterized in that both ends of the induction coil L1 are connected to the input end of a differential high-gain operational amplifier circuit through a pair of twisted-pair; the input end is connected to a resistor attenuation network performing functions of a differential mode and a common mode attenuation interference; the output end of the differential high-gain operational amplifier circuit is connected to the input end of a constant current power amplifier circuit with adjustable current; the constant current power amplifier circuit outputs current pulses with constant peak, is connected to the excitation coil L2 through a pair of twisted-pair; and receives steel chord frequency signals output from the output of the operational amplifier circuit through an inverter. The circuit can overcome the problems in the existing technology and the received frequency is not affected by cable length.

The invention discloses a pressing cap structure of a hydraulic jar. The pressing cap structure of the hydraulic jar comprises a pressing cap (1) for limiting axial movement of an overflow piston (6), a jarring hydraulic cylinder (4) and a mandril (5). The pressing cap (1) is sleeved on the mandril (5) located in the jarring hydraulic cylinder (4), a screw hole (1-1) is arranged in the radial direction of the pressing cap (1), and a screw (3) in the screw hole (1-1) is tightened to enable the pressing cap (1) to be fixedly connected with the mandril (5). The pressing cap structure of the hydraulic jar is characterized by comprising a connection pin (2), a through hole (1-2) is arranged on the pressing cap (1) in the direction perpendicular to the screw hole (1-1), the screw (3) is provided with a groove (3-1) matched with the through hole (1-2), and the connection pin (2) penetrates through the through hole (1-2) to be fixedly connected with the groove (3-1). The pressing cap structure of the hydraulic jar has the advantages of being capable of avoiding loosening and long in service life.

The invention discloses a drainage positioning grouting segment and a construction method thereof. The drainage positioning grouting segment comprises a prefabricated segment body and a grouting drainage system, wherein the prefabricated segment body comprises a segment solid body, a prefabricated drill hole and a preset water pressure pore sensor mounting hole; the grouting drainage system comprises a pre-installed valve, a pre-embedded air bag, a grouting drainage guide pipe and a water pressure pore sensor; and when the water pressure collected by the water pressure pore sensor exceeds a segment stress early warning value, the engineering problems such as segment deformation and crack water seepage can be prevented by opening the valve for drainage or by opening the valve for drainage first and then conducting grouting reinforcement. According to the drainage positioning grouting segment and the construction method thereof, the prefabricated drill hole and the pre-embedded groutingdrainage system are adopted, on-site drilling and grouting drainage device mounting on a shield segment are not needed, drainage is conducted directly through the pre-installed valve, grouting is conducted through the pre-embedded grouting drainage guide pipe after the valve is dismounted, prevention and rapid and safe treatment of common engineering problems of the shield segment are achieved, the construction cost is reduced, and the construction period is shortened.

The invention relates to a three-view-field digital holographic detection device and method based on a two-dimensional period grating and point diffraction. The device comprises a light source (1) with emission wavelength lambda, a polarizer I (2), a collimating beam expansion device (3), a measurement window (4), a to-be-detected object (5), a first lens (6), a two-dimensional period grating (7), a hole array (8), a polarizer II (9), a polarizer III (10), a polarizer IIII (11), a second lens (12), a diaphragm (13), an image sensor (14) and a computer (15). View field translation and frequency domain separation are realized through two-dimensional period grating light splitting and carrier wave introduction, interference among three beams of object light can be avoided through the polarizer set, and crosstalk among frequency spectrum can be reduced. The device is advantaged in that the device is simple and easy and is convenient for adjustment, an image sensor view field utilization rate is high, the hologram carrier wave frequency mapping relationship is simple, easy determination is realized, through grating defocusing accurate control, system carrier wave frequency determination complexity is low, and efficiency of a phase recovery algorithm is high.

The invention relates to a preparation method of a self-tracing grating standard substance capable of accurately shortening a pitch value, which is used for preparing a hundred-nanometer-scale and below small-pitch tracing standard substance on the basis of a laser convergence atomic deposition technology and a soft X-ray interference photoetching technology, and comprises the following steps of:(1) obtaining a mask substrate; (2) adopting a laser convergence atomic deposition technology to deposit and prepare a mask on the mask substrate; (3) obtaining a photoresist sample which comprises photoresist and a second underlayment, exposing and developing the photoresist by adopting the mask through a soft X-ray interference photoetching technology to obtain a photoresist grating structure; and (4) transferring the photoresist grating structure to the second underlayment to obtain the self-tracing grating standard substance. Compared with the prior art, the self-tracing grating standard substance prepared by the method has the advantages of high precision, traceability, accurate shortening of the pitch value and the like.