312results about How to "Improve simplicity" patented technology

The invention relates to the technical field of automobile air conditioners, in particular to a heat management integration module and an automobile air conditioning system. The heat management integration module comprises a compressor, a liquid cooling condenser and a plate type evaporator; the compressor comprises an air suction cover and an exhaust cover which are opposite to each other in the first direction, an air suction port is formed in the air suction cover, and an exhaust port is formed in the exhaust cover. The liquid cooling condenser comprises a condenser sheet bar body. The first end of the condenser plate sheet main body is in contact with an exhaust cover of the compressor, so that an air inlet of the condenser plate sheet main body is directly butted with an exhaust port of the exhaust cover; the plate-type evaporator comprises an evaporator plate sheet main body; the first end of the evaporator plate sheet body makes contact with an air suction cover of the compressor so that an air outlet of the evaporator plate sheet body can be directly in butt joint with an air suction opening of the air suction cover. According to the heat management integrated module, the problems that when an existing heat management integrated module is actually arranged, the design size of the integrated module is large, arrangement of a whole vehicle is not facilitated, installation is complex, and the leakage risk is large are solved.

The invention provides a position prediction method and device based on an ultra wide band (UWB) digital key, and a position prediction system applied to the UWB digital key, the position prediction system comprises a UWB tag and a plurality of UWB anchor points arranged on a vehicle, and the position prediction method comprises the following steps: determining whether UWB positioning information of the UWB tag is invalid; when the UWB positioning information is invalid, acquiring a velocity vector and a historical track set of the UWB tag and orientation information of the vehicle; and inputting the velocity vector, the historical trajectory set and the orientation information into a position prediction calculation model to calculate a predicted position of the UWB tag. The technical problem that when an existing automobile digital key is blocked by an obstacle and the digital key cannot be connected to an automobile UWB anchor point, the function of the digital key is in a failure or invalid state, and the user experience is affected is solved.

The invention relates to the technical field of relay protection, in particular to a new energy grid-connected line phase-to-phase distance protection adaptability quantitative evaluation method and a new energy grid-connected line phase-to-phase distance protection adaptability quantitative evaluation system. Calculating conventional power supply and new energy short-circuit current data of the bus at the side when the three-phase fault of the bus at the receiving end occurs, and preprocessing the short-circuit current data; calculating a short-circuit ratio of a conventional power supply to new energy based on the preprocessed short-circuit current data; and judging the distance protection adaptability of the output grid-connected line according to the short-circuit comparison. According to the method, the ratio of the conventional power supply to the new energy short-circuit current is calculated, and the short-circuit ratio threshold value 1.73 is introduced as a criterion, so that quantitative evaluation of the new energy grid-connected line distance protection adaptability is realized. According to the method, the defect that a traditional evaluation method depends on complex transient simulation is overcome, the evaluation efficiency is remarkably improved, and meanwhile the accuracy of an evaluation result is guaranteed. The invention provides a quantitative criterion of new energy grid-connected line distance protection adaptability for the first time.

The invention discloses a chemical raw material detection method and system based on an adversarial network, a medium and equipment, and relates to the technical field of power demand response. The method comprises the following steps: acquiring to-be-detected chemical raw material data; a chemical raw material detection model is constructed, the chemical raw material detection model is trained, and the training steps comprise: obtaining a known chemical raw material data set, learning chemical raw material data based on a superposition state of quantum bits to construct a hidden space, and expanding the chemical raw material data set by using an adversarial network with the hidden space; and training a chemical raw material detection model by using the expanded chemical raw material data set, and detecting the to-be-detected chemical raw material data by the detection model to obtain a chemical raw material identification result. According to the method, the chemical raw material data is expanded through the generative adversarial network based on the multi-quantum superposition state, the problem that the model generalization ability is poor due to insufficient training samples is effectively solved, and the accuracy of the detection result is improved.

The invention relates to the technical field of car lamps, and provides a car lamp thick-wall part which comprises a lens, a light guide plate and a light guide plate. At least one side, facing the lens, of the substrate is designed to be a plane; the LED lamp beads are located on the side, facing the lens, of the substrate, and the LED lamp beads are electrically connected with the substrate; the LED lamp bead can move relative to the lens and can be aligned with the light inlet through displacement, so that light rays of the LED lamp bead enter the light inlet in a concentrated mode and are emitted outwards from the other side of the lens. The positions of the LED lamp beads can be adjusted, so that the LED lamp beads can generate displacement, the LED lamp beads are aligned to the light inlet through displacement, light rays are emitted into the lens from the light inlet in a concentrated mode, on the basis of plane design of the substrate, the needed optical performance is achieved, and the material cost and the design cost of the thick-wall part of the automobile lamp are reduced.

The invention discloses a fine-grained vulnerability detection method, system and device for an intelligent contract and a storage medium, and belongs to the technical field of intelligent contract vulnerability detection. The method comprises the steps of obtaining to-be-detected smart contract code data comprising a plurality of statements; traversing the to-be-detected smart contract code data according to the node type of the statement to generate a code control flow set; inputting the code control flow set into a prompt template to obtain a prompt text embedding sequence corresponding to each code control flow; inputting the prompt text embedding sequence corresponding to each code control flow into a residual network, and converting the prompt text embedding sequence into a re-parameterized embedding sequence through a residual re-parameterization operation; and inputting the re-parameterized embedded sequence into a fine-grained vulnerability detection model to obtain a vulnerability set of the to-be-detected smart contract, performing scoring calculation on vulnerabilities corresponding to the code control flows, and performing sorting according to scoring calculation results to obtain a fine-grained vulnerability detection result. According to the method, the code control flow with vulnerabilities is detected, and the fine-grained vulnerability detection result is obtained.

The utility model discloses an intelligent garage thrust car stopping mechanism, which belongs to the technical field of intelligent garage equipment and comprises a frame body, a turning cover is movably mounted on one side of the top of the frame body, a car stopping roller is rotatably mounted at the bottom of the turning cover, and a linear gear reducer is fixedly mounted in an inner cavity of the frame body. A motor push rod is installed on the linear gear reducer in a matched mode, a transmission assembly is arranged between the turning cover and the motor push rod, one end of the motor push rod is used for turning the roller through the transmission assembly, and an auxiliary supporting assembly is installed in the inner cavity of the frame body and located on one side of the linear gear reducer. By simplifying the structure and optimizing space utilization and debugging and maintenance modes, the overall performance and reliability of equipment are improved, the requirements of practical application are met, the design has remarkable advantages in the aspects of simplifying operation and reducing cost and maintenance difficulty, and an efficient and reliable car arrester solution is provided for the market.

The invention relates to a visual portable bottom mud sampler, which belongs to the technical field of river channel bottom mud sampling detection, and comprises a transparent pipe, the top of the transparent pipe is in threaded connection with a connecting pipe, the outer surface of the connecting pipe is provided with a connecting assembly for improving the stability of the sampler, and the outer surface of the connecting assembly is provided with four foot stools for providing supporting force. An impact mechanism for improving the sampling efficiency and saving manpower is arranged at the top of the connecting assembly, a measurement and control assembly for providing energy for the device is arranged at the top of the impact mechanism, a receding assembly for improving the operation stability of the device is arranged at the top of the measurement and control assembly, and a negative pressure assembly for performing negative pressure extraction on sludge is arranged on the inner side of the transparent pipe. According to the visible portable bottom mud sampler, the device can be quickly mounted and dismounted through the connecting assembly, the portability of the device is further improved, and meanwhile, through the detachable design of the transparent pipe, the connecting pipe and the receding pipe, the carrying convenience is further improved.

The invention relates to a semantic extraction model and method for enhanced generation of case information retrieval, and the model comprises four parts: a case file data processing module, a semantic-based document pre-splitting module, a rule-based semantic segmentation post-processing module, and a document splitting result processing and storage module. According to a data form of a case file document, in combination with the advantages of a rule-based document partitioning method and a semantic analysis model SeqModel, understanding and effective segmentation of context semantic contents of the document are realized. According to the method, the model structure is simple, the universality is high, the advantages of a natural language processing semantic analysis model and a rule model are integrated, not only is the dependency relationship of context semantics considered, but also the format characteristics under the specific data format are concerned, the SeqModel model can be trained and the rule can be formulated according to the actually-applied document data field, and the method is suitable for being applied to the field of document data. And efficient splitting of large-scale documents is realized.

The invention relates to the technical field of wire harness conduction testing, in particular to a new energy wire harness conduction testing system, which automatically scans all point locations of a wire harness conduction testing jig, generates an activated point location set, applies signals to the activated point locations, obtains electrical connection states among the point locations, and combines loop data of the same main point location to test the conduction of the new energy wire harness. And a simplified conduction result set is generated, redundant data is reduced, and subsequent processing is facilitated. And the result confirmation module ensures the effectiveness and accuracy of the conduction result set through dual verification, and prevents non-defective products from being misjudged as defective products. And the memory verification module verifies the current conduction result set through memory, intelligently processes the loop memory by using a neural network, automatically judges whether the models of the wire harnesses are matched or not by comparing the conduction result set with the loop memory, and deletes the loop memory which does not need to be used any more, so that the verification capability of the system on the wire harnesses of different models is improved. The system effectively improves the efficiency, the accuracy and the reliability of the wire harness conduction test.

The invention provides a voice interaction operation method and system for a natural resource investigation monitoring system, and the method comprises the steps: obtaining a voice operation instruction received by a user side of the natural resource investigation monitoring system, and carrying out the recognition and extraction of the voice operation instruction through a pre-constructed improved natural language processing model, obtaining basic elements in the voice operation instruction; querying and replacing a pre-constructed natural resource investigation monitoring knowledge graph through the basic elements to obtain corresponding operation prompts; generating a system executable code for the operation prompt by using a large language model, and outputting a final operation result of the natural resource investigation monitoring system according to the system executable code. According to the automatic interaction operation based on the user voice, natural language processing and the knowledge graph technology are combined, and therefore usability and user friendliness of interaction operation of a natural resource investigation and monitoring professional software system are effectively improved.

The invention belongs to the technical field of generators, and particularly relates to a hybrid nano generator and a power management circuit thereof, comprising a shell, and an electromagnetic power generation unit, a friction power generation unit and a piezoelectric power generation unit which are located in the shell; and a corresponding power management circuit. The interior of the shell is connected with the top end and the bottom end in a penetrating mode through a glass fiber connecting shaft. A friction power generation unit, an electromagnetic power generation unit and a piezoelectric power generation unit are sequentially mounted at the bottom end, opposite to the shell, of the glass fiber connecting shaft; the piezoelectric power generation unit comprises at least four cantilevers and a disc, one end of each cantilever is fixed on the disc, and a mass block is placed on the upper surface of the other end; the center of the disc is connected with a glass fiber connecting shaft, and the inner sides of the upper surfaces of the four cantilevers are covered with PZT materials. According to the hybrid nano generator, vibration energy in the environment can be converted into electric energy, and energy is supplied to wireless sensor network nodes.

The utility model belongs to the technical field of cigarette sorting, and particularly relates to a conveying deviation rectifying device for cigarette sorting, which comprises a conveying table. The top of the conveying table is fixedly connected with a fixed table; the top of the conveying table is rotationally connected with a conveying belt. The inner side of the conveying table is rotationally connected with a pair of conveying rollers. The outer side wall of the conveying roller is attached to the inner side wall of the conveying belt. The outer side of the conveying table is rotationally connected with a first connecting column. The first connecting column is connected with the conveying roller; in the working process, a first push plate can be driven to rotate through a second transmission belt and a second rotating column, the first push plate can extrude cigarettes, blocked by a deviation rectifying roller, on the top of a conveying belt in the rotating process, so that the deviation rectifying roller is matched with a sliding block through a connecting block, the deviation rectifying roller can move upwards, and the cigarettes can pass through the bottom of the sliding block; according to the whole device, the cigarettes conveyed by the conveying belt are corrected, so that the steps of correcting the cigarettes by workers are reduced, and the working efficiency of the workers is improved.

The embodiment of the invention discloses an information interaction method and device for a driver-side application program, and the method comprises the steps: setting an information interaction panel on a main page of the driver-side application program, and adaptively recommending a recommendation card with information and an operation entrance in the information interaction panel according to a scene, thereby enabling the information interaction to be more accurate in the information interaction process, and improving the user experience. A user can obtain the recommendation information without jumping in different pages in an application program, and can directly jump to an operation page wanted by the user through an entry on a recommendation card, and meanwhile, interference information is shielded by setting a corresponding recommendation strategy according to a scene, so that the interaction process is simplified, the simplicity of information interaction is improved, and the user experience is improved. And the use efficiency and the use experience are improved.

The invention relates to the technical field of logistics management, in particular to an in-transit supervision method for large-size transportation on an expressway. The method comprises the following steps: acquiring transportation speed data and transportation vibration data; carrying out transportation speed feature extraction on the transportation speed data to obtain transportation speed feature data, and carrying out transportation vibration feature extraction on the transportation vibration data to obtain transportation vibration feature data; performing feature map construction on the transportation speed feature data and the transportation vibration feature data to obtain transportation speed vibration feature map data; abrupt change feature collection and change degree extraction are carried out according to the transportation speed vibration feature map data, and transportation abrupt change feature data and transportation change degree data are obtained so as to carry out large piece transportation anomaly detection operation. According to the invention, the safety and the management level of the large-piece transportation process are effectively improved.

The invention belongs to the technical field of FPGA ASerDes serial interfaces, and discloses a serial high-speed interface packaging method and system based on an FPGA. A user interface module is designed, and the user interface module is used as a channel for data interaction between a user module and the SRIOIP core; a maintenance module is designed and used for carrying out maintenance operation on the RapidIO device through a read-write transaction; a request module is designed and used for executing a request test sequence, request packet packaging, a request response verification function and response packet analysis; designing a target module for responding to the request transaction packet of the initiating device; an SRIO communication software framework is designed for caching transmission data and solving rate matching of a user clock domain and an SRIO clock domain. According to the method, the use efficiency of the RapidIO bus and the simplicity and convenience of operation are improved, and the use efficiency and the development speed can be improved by packaging according to the method.

The invention relates to the technical field of dry granulation, in particular to dry granulation machine equipment and a process thereof.The dry granulation machine equipment comprises a hopper and two granulation rollers inserted in the hopper in parallel, the rotation directions of the two granulation rollers are opposite so as to drive materials to move from top to bottom, and the two granulation rollers are arranged in the hopper. A plurality of arc-shaped convex strips are arranged on the peripheral wall of each granulation roller, the convex strips jointly form an annular wavy structure, the convex strips extend in the axial direction of the granulation rollers, the two sides of each convex strip are each provided with two extrusion groove sets, and each extrusion groove set comprises a plurality of extrusion grooves which are formed at equal intervals and extend in the extending direction of the corresponding convex strip. In the using process, firstly, materials are put between the two granulation rollers through the top of the hopper, then the two granulation rollers are driven to rotate in the opposite directions, and along with rotation of the granulation rollers, the extrusion grooves in the two granulation rollers are close to each other and then away from each other, so that the materials are extruded.

The utility model discloses a multifunctional short stock fruit tree pruning tool, and particularly relates to the technical field of pruning tools, the multifunctional short stock fruit tree pruning tool comprises a box body, the bottom of the box body is connected with a box cover through a hinge, a protective pad is arranged in the box body, a plurality of through holes are formed in the protective pad, a pruning knife is arranged in one of the through holes, and the box cover is connected with the box cover through a hinge. Cutting teeth are arranged on one side of the trimming knife, a trimming mechanism is arranged on the other side of the trimming knife, and an auxiliary mechanism is arranged in the through hole in the other side of the trimming knife. The trimming mechanism and the cutting teeth are arranged on the two sides of the trimming knife respectively, so that the trimming knife can obtain various trimming modes through the trimming mechanism and the cutting teeth; therefore, when the branches of the fruit tree need to be pruned in various pruning modes, the branches of the fruit tree can be pruned smoothly only through the device without the help of various pruning tools, and by means of the arrangement, the convenience and practicability of the device are obviously improved when the device is used.

The invention discloses a bidirectional charging and discharging system and method for an energy storage battery, and relates to the technical field of energy storage batteries, and the method comprises the following steps: obtaining a battery model, calculating a battery capacity loss value, setting a charging simulation parameter and a discharging simulation parameter, simulating battery charging and battery discharging, and detecting a first battery temperature and a second battery temperature, setting a first confidence battery temperature and a second confidence battery temperature, respectively matching corresponding charging duration and discharging duration, acquiring a user request, and identifying and executing a first operation. According to the method, the capacity loss value of the battery is accurately calculated, the calculation simplicity is improved, the voltage is continuously regulated and controlled through a control variable method, the simulation scientificity is improved, visual data feedback is provided, a reasonable voltage interval is selected according to the temperature of the battery, and by matching the corresponding charging duration or discharging duration, the battery capacity loss value can be accurately calculated. And the sustainability of the battery and the requirements of a user are met.

The invention provides a primer group and a kit for detecting NF1 gene mutation by using a long-read-long sequencing platform and application of the primer group and the kit. The primer group provided by the invention comprises primers for amplifying all exons of the NF1 gene and intron regions of flanks at two ends of the exons, and primers for amplifying the NF1 gene and deletion mutation of 50kb regions of the flanks at two ends of the NF1 gene. In combination with the characteristics of a long-read-long sequencing platform, various mutations of the NF1 gene can be comprehensively, accurately, quickly and simultaneously detected at high throughput.

This invention provides an on-chip FLASH functional testing system based on an off-chip SPI master, relating to the field of integrated circuit and memory control technology. The system receives operation commands and corresponding data from an off-chip SPI master via on-chip SPI and transmits them to a controller with an independent SPI interface for the on-chip FLASH. The controller executes corresponding operations on the on-chip FLASH based on the operation commands and data, and transmits the execution results back to the off-chip SPI master via on-chip SPI. The off-chip SPI master generates functional test results for the on-chip FLASH based on the execution results fed back by the controller. The controller of this invention enables the off-chip SPI master to access and functionally test the on-chip FLASH in the same way as the off-chip FLASH. The entire testing process is transparent to the upper-layer system, requiring no additional adaptation logic, significantly improving the simplicity of the testing process and the system integration.

The utility model discloses a skull temporary fixator relates to medical technical field, including auxiliary adjusting ring, the inside rotation of auxiliary adjusting ring is installed with auxiliary guide disc, the inside slide of auxiliary guide disc is installed with power guide column, the surface fixed mounting of power guide column has temporary fixed link, the surface slide of temporary fixed link is installed in the inside of auxiliary adjusting ring, this skull temporary fixator, the operator controls auxiliary pushboard piece to drive power guide column on temporary fixed link extension after skull complete reset, at this time, again, auxiliary pushboard piece is reset to ninety degrees rotation, therefore, L shape temporary fixed link can be taken out at skull gap, and the mode not only effectively guarantees the simplicity of pressing adjustment when skull is fixed, but also guarantees the reliability of the fixator to cope with arc skull and carry out fixed adjustment, improves the drawback that traditional T type temporary fixed link can only be applied to straight skull seam and is inconvenient to go in and out in arc skull seam.

The utility model discloses a frame type building curtain wall, which belongs to the technical field of building curtain walls, and has the technical key points that the frame type building curtain wall comprises a building curtain wall body, mounting frames can be mounted and connected one by one before pre-mounting through an arranged splicing mounting mechanism, so that the frame type building curtain wall is convenient to adapt to large-area splicing mounting; a second mounting groove in a second side fixing frame and a first mounting block on one side of the mounting frame can be adaptively mounted and connected through a limiting mounting mechanism, and a second mounting block on a first side fixing frame and a first mounting groove in the other side of the mounting frame can be adaptively mounted and connected; the mounting frame, the second side fixing frame and the first side fixing frame can be connected and fixed through the arranged mounting plate, so that mounting bolts can be conveniently fixed, the mounting number of the bolts is greatly reduced, the mounting convenience is improved, and the mounting efficiency is improved. The device has the advantages of simple installation and convenient installation and use.

The utility model relates to the technical field of chemical equipment, in particular to a catholyte discharge tank which comprises a discharge tank main body, the discharge tank main body is of a vertical cylinder structure, the top of the discharge tank main body is provided with a cone top, the cone top is of a conical structure formed by splicing a plurality of module plates, and the module plates are arranged on the top of the discharge tank main body. Reinforcing angle steel is arranged at the tops of the joints of the module plates, a sleeve is arranged in the center of the top of the conical top, and the reinforcing angle steel is evenly arranged in a surrounding mode with the sleeve as the center. The catholyte discharge tank adopts a conic node structure design, and is simpler and more convenient to construct compared with an arch crown structure, so that the construction cost and time are reduced, and the complexity and danger of high-altitude operation are reduced.

The utility model relates to the field of water pumps, in particular to a water diversion device and a fire pump, the water diversion device comprises a water diversion pump body and a conduction device, the conduction device comprises a driving wheel, a driven wheel, a tensioning wheel, a tensioning belt used in cooperation with the driving wheel, the driven wheel and the tensioning wheel and a driving assembly, and the driving assembly is rotationally connected to the water diversion pump body; the tensioning wheel is rotationally connected to the driving assembly, the driving wheel is coaxially connected to a driving shaft of the speed reducer, the driven wheel is coaxially connected to a pump shaft of the primer pump body, the tensioning belt is connected with the driving wheel and the driven wheel, and when the driving assembly rotates and drives the tensioning wheel to be away from the driving wheel, the tensioning wheel is connected with the driving wheel, the driven wheel and the tensioning wheel in a tensioning mode. Through the arrangement of the driving wheel, the driven wheel, the tensioning wheel, the tensioning belt and the driving assembly, directional starting of the primer pump body is achieved, workers do not need to manually drive the primer pump body to operate all the time, the operation difficulty of the workers is lowered, the starting period of the fire pump is shortened, and therefore the using simplicity and convenience of the fire pump are improved.

This utility model relates to the field of wiring harness rubber sleeve technology, and more particularly to a rubber sleeve for automotive door wiring harnesses. It includes a main body mechanism for improving structural strength, on which a connecting mechanism for stable connection with the vehicle door body is provided. The main body mechanism includes a telescopic sleeve, with connecting tubes fixedly connected to both ends of the telescopic sleeve. Multiple annular iron plates are installed inside the telescopic sleeve, and circular plates are fixedly connected to each of the annular iron plates. This utility model significantly improves the overall structural strength of the device by setting up the main body mechanism. By using EPDM rubber and adding 5 phr microencapsulated antioxidants, the wear resistance of the telescopic sleeve and connecting tubes is improved, effectively resisting fatigue cracks caused by repeated bending. The multiple annular iron plates enhance mechanical support, disperse frictional stress, prevent accelerated wear and cracking of the vehicle body sheet metal, and improve the service life of the device.

The utility model provides an oily food crushing and sampling device. The oily food crushing and sampling device comprises a box body, two feeding ports are formed in the top of the box body, a crushing mechanism and a screening mechanism are arranged on the box body, the crushing mechanism is communicated with the screening mechanism, a discharging pipe is arranged at the bottom of the box body, a sampling mechanism is arranged on one side of the box body and one side of the screening mechanism, and a discharging pipe is arranged on the other side of the box body. And the sampling mechanism is communicated with the crushing mechanism. The oily food crushing and sampling device provided by the utility model has the advantages of more uniform and thorough crushing, stable screening, easiness in operation, selective sampling and higher working efficiency.

The invention relates to the field of underground pipeline laying equipment, in particular to underground pipeline laying equipment for landscaping engineering, which comprises a base, an adjusting assembly and a limiting device, the limiting device comprises a winding roller, at least two sliding seats and at least two limiting assemblies, and the surface of the base is provided with a sliding flow channel; the adjusting assembly comprises a sliding block and at least two first connecting rods, an adjusting flow channel is formed in the surface of the base, the first connecting rods correspond to the sliding seats one to one, one ends of the first connecting rods are rotationally connected to the surfaces of the sliding seats, and the other ends of the first connecting rods are rotationally connected to the surfaces of the sliding blocks. When the sliding block slides in the direction close to the sliding flow channel along the adjusting flow channel, the two sliding bases are driven to be away from each other. According to the underground pipeline laying equipment, the sliding seat, the winding roller and the limiting assembly are arranged, so that the length of the part, wound on the winding roller, of the pipeline is not limited, the requirement for laying of different pipelines can be met, and therefore the practicability of the underground pipeline laying equipment is improved.

The utility model relates to the technical field of central air conditioner pipe fixing tools, in particular to an adjustable central air conditioner pipe fixing hoop frame which comprises a pipe body used as a device body, and two fixing mechanisms used for fixing pipelines of different specifications are symmetrically arranged at the two ends of the pipe body. The fixing mechanism comprises two first clamping rods, two second clamping rods and a supporting plate, and connecting plates are fixedly connected between the first clamping rods and the second clamping rods located on the same side. By arranging the fixing mechanism, the device can adaptively fix pipe bodies of different specifications, the two sides of the pipe bodies are supported and clamped through a combination formed by the first supporting rods, the second supporting rods and the connecting plates, and the two-way threaded rod is driven to rotate through the micro motor; and the two long plates slide in the sliding grooves through the multiple sliding blocks, so that the two fixing plates can move relatively, and therefore the device is suitable for pipe bodies of different specifications, and the applicability is high.

This invention discloses a low-pass filtered non-breath-hold saline angiography combined with cardiac mirror contrast imaging for lung perfusion imaging, belonging to the field of medical imaging technology. The method includes the following steps: S1: determining whether the subject's tidal impedance variation meets the imaging criteria; S2: injecting contrast agent into the subject to perform angiography; S3: obtaining an impedance decrease signal; S4: combining cardiac mirror contrast imaging with lung perfusion images. This invention solves the problem of low success rate of saline angiography in existing technologies, achieves separation of thoracic impedance caused by tidal breathing and thoracic impedance caused by saline angiography, reduces the influence of the cardiac region on lung perfusion images, further improves the accuracy of lung perfusion imaging, greatly reduces the interference of breath-holding on respiratory circulation, improves the simplicity of clinical application, and expands clinical application scenarios.