846results about How to "Avoid exposure" patented technology

The invention provides an information management method and system for an access control card chip. The method comprises the following steps: providing an anonymous identifier, initializing an authentication process, and laying a foundation for privacy protection and a data link; mutual trust authentication of the access control card and the equipment is completed, and authentication challenge data is provided for follow-up behavior recording and tracing; based on a result and challenge data generated after authentication is completed, generating a complete encryption behavior record and establishing a chained hash structure; storing the encrypted behavior record and the chained hash value locally or synchronizing the encrypted behavior record and the chained hash value to a server to ensure the reliability and traceability of the behavior record; and detecting abnormal behaviors and supporting traceability verification by using complete behavior chain data. Dynamic identity generation, encryption behavior chain storage and a bidirectional authentication mechanism are integrated in the access control card chip, so that the privacy protection capability, the safety and the tracing efficiency of the access control system are remarkably improved.

The invention discloses a data integrity protection method in an archive record tracing process based on a block chain, and the method comprises the steps: generating a hash value for each archive record as a tracing starting point, carrying out the traversal from the tracing starting point, generating an integrity check code when passing through a node of the block chain every time, comparing the current time with an archive secrecy period, and carrying out the data integrity protection. The method comprises the steps of obtaining an access control result, creating an encryption index for an archive record allowed to be accessed by a user in the access control result, selectively exposing data and obtaining identification data through the encryption index based on a traceability purpose, decomposing a traceability request into a plurality of sub-requests, and distributing the sub-requests to different block chain nodes to perform traceability processing based on the identification data. And aggregating different sub-query results to obtain a final traceability result. According to the method, a highly safe, reliable and transparent data integrity protection mechanism is provided for archive recording by utilizing the core characteristics of the block chain, the data integrity is enhanced, and meanwhile, the method has relatively good interpretability.

The invention discloses a scene-based data accurate desensitization virtual power plant user privacy protection method. The method comprises the following steps of: firstly, setting different desensitization intensities according to the sensitivity of data through a hierarchical desensitization method, and selecting different desensitization technologies to perform encryption processing or access control according to the use and use scene requirements of the data, so as to realize privacy protection and accurate desensitization; secondly, accurately identifying sensitive information in the data by adopting a sensitive attribute identification module, and matching proper desensitization intensity and strategy for the sensitive information; then, data hierarchical storage and encrypted transmission are adopted, and it is ensured that data of different hierarchies are properly protected; finally, a reasonable access control strategy is set according to different scenes and data sensitivities, unauthorized access and abuse are avoided, and meanwhile the accurate desensitization efficiency is optimized. According to the method, an efficient and safe solution is provided for user privacy protection in the virtual power plant by combining hierarchical desensitization, sensitive attribute identification, Merkle tree storage, encryption transmission and attribute-based access control.

The invention discloses a moistureproof electrical cabinet sealing device for a wind power station, and relates to the technical field of electrical cabinet sealing and moistureproof, the moistureproof electrical cabinet sealing device comprises a cabinet body and a protection device, the top of the cabinet body is fixedly provided with a top plate, the right side of the cabinet body is slidably provided with a cabinet door in a penetrating manner, and a rubber strip is arranged between the cabinet body and the cabinet door. A first spring is arranged between the cabinet body and the cabinet door, the protection device comprises a limiting hole, a limiting frame, a limiting rod, a limiting block, a reset spring, a hollow block and a U-shaped plate, the limiting rod moves in the direction away from the cabinet door to drive the limiting block to move, and the limiting block moves to be separated from the limiting hole and release limiting of the cabinet door; the limiting hole is formed in the front side of the cabinet door, the limiting frame is fixedly installed on the right side of the cabinet body, electrical equipment can be effectively prevented from being exposed in humid air due to mistaken touch of external force through the U-shaped plate, and therefore the moisture-proof performance of the cabinet body is improved.

The invention provides a wind generating set blade interior inspection robot, and relates to the technical field of wind power generation, the wind generating set blade interior inspection robot comprises a robot body, the robot body is composed of a Mecanum wheel chassis, a robot tower bottom cabinet and a robot cabin cabinet, and the robot tower bottom cabinet is arranged at the top end of the Mecanum wheel chassis; a robot cabin cabinet is arranged at the top end of the robot tower bottom cabinet, and a monitoring sensing device is arranged on the outer side of the robot cabin cabinet. According to the invention, the monitoring sensing device is arranged, and the interior of the cabin of the generator set is effectively monitored by monitoring the operation of a sensor, so that the problems that the existing wind turbine generator inspection robot is mainly an unmanned aerial vehicle, and the appearance and blades of the wind turbine generator are monitored in the prior art are effectively improved; the problems that the interiors of the wind turbine generator blades cannot be continuously monitored in real time, and meanwhile, the interiors and important positions of the wind turbine generator blades cannot be monitored and daily maintenance requirements cannot be met are solved.

The utility model relates to an insulin treatment cart. The insulin treatment cart comprises a frame; the operation table top is arranged at the top end of the frame and comprises a special injector box for placing an insulin injector, a special blood glucose testing box for placing related tools for testing blood glucose and a blood glucose meter placing frame for placing a blood glucose meter, and a sharp instrument box for conveniently recycling a needle head of the insulin injector is arranged in the special blood glucose testing box; the sharp instrument box comprises a box body and a box cover detachably arranged at the top of the box body, a dismounting hole is formed in the end face of the box cover, a dismounting ring is arranged in the dismounting hole, and a plurality of clamping blocks matched with the peripheral wall of a needle of the insulin syringe are arranged on the inner end face of the dismounting ring in the circumferential direction at intervals. And the drawer is arranged below the operation table top. Compared with the prior art, insulin for diabetes treatment and related tools can be placed in the insulin storage box in a standard mode, meanwhile, the insulin needle recycling box is arranged, medical workers are prevented from being punctured by needles, and the medical workers can conveniently find related articles and discard the needles after injection.

The invention belongs to the technical field of panoramic shooting, and particularly relates to a panoramic shooting telescopic camera which comprises a shell, a sliding displacement assembly, a lifting protection assembly, a rotary wiping assembly, a driving assembly and an acceleration assembly. The sliding displacement assemblies are arranged in the four directions of an inner cavity of the shell at equal intervals in a surrounding mode with the circle center perpendicular line of the shell as the center and comprise vertical fixing frames fixed to the top wall of the inner cavity of the shell, sliding blocks are arranged at the lower ends of the fixing frames in a sliding mode, and the sliding blocks slide in the direction close to / away from the circle center of the shell at the same time. And a lens is fixedly arranged below the sliding block. According to the invention, the positions of the four lenses can be controlled by sliding and telescoping simultaneously through the driving assembly, the acceleration assembly and the sliding displacement assembly, and the lenses which are not used can be shielded and protected through the lifting protection assembly, so that the lenses are prevented from being directly exposed to the outside, and the service life of the lenses is prolonged; floating dust on the surface of the lens can be wiped through the rotary wiping assembly, and shooting is facilitated.

The invention relates to the technical field of under-pressure operation equipment, in particular to remote control type gas well under-pressure operation equipment and a control system and method thereof. The remote control type gas well under-pressure operation equipment comprises a working platform and a control device, wherein the working platform is provided with a plurality of working devices; the working device is connected to a hydraulic power source through a hydraulic pipeline; the hydraulic power source is in signal connection with the remote control center, and the remote control center is provided with a series of detection equipment used for collecting under-pressure operation data and working data of the working device. And the remote control center controls the hydraulic power source according to data collected by the detection equipment, so that the hydraulic power source adjusts hydraulic parameters of the working device to complete under-pressure operation. According to the invention, a worker can finely adjust each power assembly of related working devices through the remote control center, so that the operation of conveying, lifting, lowering, spinning and the like of an oil pipe can be realized; the workers are prevented from being exposed in the under-pressure operation environment, the risk that the workers are injured is reduced, and meanwhile the precision of various under-pressure operations is ensured.

The invention relates to the technical field of metal composite wires, in particular to a manufacturing method and device of a double-layer metal composite wire. The manufacturing method comprises the following steps that S1, a double-layer metal composite blank rod is taken, the double-layer metal composite blank rod comprises a core layer metal wire and a metal coating layer coating the outer side of the core layer metal wire, and the tensile strength of the metal coating layer is larger than that of the core layer metal wire; s2, the double-layer metal composite blank rod is subjected to multi-pass drawing, a composite metal wire is obtained, pulse current is applied to a metal coating layer located in a drawing area in the drawing process, the mechanical property of the metal coating layer is made to be matched with that of a core layer metal wire, and interface fracture is restrained; and S3, the composite metal wire is subjected to annealing treatment, and the composite metal wire is obtained. According to the method, the effect that only the metal coating layer is softened is achieved by controlling pulse current parameters and utilizing the skin effect and the electroplastic performance, the drawing deformation of the inner metal and the drawing deformation of the outer metal are consistent, the quality of the composite wire is improved, and the method is suitable for the situation that the conductivity of the inner-layer metal is larger than that of the outer-layer metal.

The utility model discloses a push-pull type writing pen which comprises a pen holder and a pen core, the pen core is arranged in the pen holder, and a pen point of the pen core extends out of the pen holder. The push-pull type writing pen further comprises a sealing assembly, the sealing assembly comprises a sleeve and a sealing piece, an opening is formed in one end of the sleeve, a turnover sealing part is arranged on the sealing piece, the sealing piece is located in the sleeve, and the sealing part is configured to open and close the opening. Wherein the sealing piece is arranged outside the pen holder, and the sleeve is arranged outside the pen holder in a sleeving mode and can slide on the pen holder; the sleeve is configured to slide on the pen holder to drive the sealing component to turn over so as to open and close the opening. Misoperation is reduced, so that the use experience and safety of a user are improved.

The invention relates to the technical field of air rail transportation, in particular to a power type bogie based on a box girder type base and an induction gap adjusting method. The power type bogie comprises a box girder type base, the box girder type base comprises a suspension gap located at the bottom and communicated with an inner cavity, first rails located on the two sides of the suspension gap are arranged at the bottom of the box girder type base, and an induction magnetic stator is fixedly arranged on the inner side of the top of the box girder type base. The bogie assembly comprises a bottom frame, a motor support arranged on the bottom frame and walking wheels arranged on the bottom frame; the top of the motor support is provided with a motor rotor having an induction gap with the induction magnetic stator, and the motor rotor is used for driving the bogie assembly to move under the action of magnetic force generated by the motor rotor and the induction magnetic stator. And the gap adjusting device is used for adjusting the size of the induction gap. A semi-closed base can be formed through the box girder type base, a bogie and other components are arranged in a box girder cavity, maintenance is convenient, the influence of weather is small, and the service life can be prolonged.

The invention discloses an explosion-proof motor for an underground coal mine, and relates to the technical field of explosion-proof motors, and the explosion-proof motor comprises a housing, the outer wall of the housing is fixedly connected with a plurality of short fins at equal intervals, the inner wall of the housing is fixedly connected with a stator around the circumference, and the inner wall of the center of the housing is rotatably connected with a rotating shaft. Through vertical separation of the flow guide plate and flow guide of concave arc faces on the two sides, the resistance of hot air shunting to the two sides can be reduced, after the hot air enters the ventilation cavity, the heat dissipation area is increased under the flat arrangement of the hot air, and heat on the surface of the ventilation cavity is rapidly guided out through cooperation of the unfolded first fins, the unfolded second fins and the unfolded third fins, so that the heat dissipation efficiency is improved. The temperature exchange rate can be increased through double heat conduction, hot air in the ventilation cavity can be rapidly cooled, airflow and temperature on the two sides can be balanced, the stability of the system is improved, the equipment temperature can be reduced through good heat dissipation, and electric sparks caused by overheating are reduced.

The invention discloses a low-retraction optical cable and a preparation method thereof, and belongs to the technical field of optical cable preparation, the low-retraction optical cable comprises a reinforcing core, and a plurality of optical units are twisted on the periphery of the reinforcing core; and the bonding layer is arranged between the reinforcing core and the optical unit, the bonding layer at least partially bonds the contact surfaces of the optical unit and the reinforcing core, and a plurality of bonding points are formed on the optical unit and the reinforcing core along the axis of the optical cable. According to the low-retraction optical cable, the bonding layer is arranged between the reinforcing core and the optical unit, a plurality of bonding points arranged in the axial direction are formed between the reinforcing core and the optical unit through the bonding layer, and due to the fact that the reinforcing core has low shrinkage, and the bonding mode of the reinforcing core and the optical unit enables a sleeve of the optical unit to be bonded and fixed by the reinforcing core; therefore, the shrinkage of the sleeve of the optical unit is avoided, and the exposure of the optical fiber is avoided; meanwhile, the intermittent bonding mode of the optical unit and the reinforcing core prevents the optical unit and the reinforcing core from being bonded too tightly and facilitates the branching of the optical unit.

The invention discloses a bone cement propelling device, and relates to the technical field of medical instruments. The two ends of the pipe body structure are a propelling section and a front end respectively, and a hole is formed in the side wall of the front end to form an outlet; and the push rod acts to enable the contents in the pipe body structure to flow out from the outlet. Bone cement can be injected and distributed in a stress concentration area where the end plate is in contact with the fusion cage, a bone grafting area in the middle of the fusion cage is avoided, and therefore the purpose of balancing end plate strengthening and blood supply is achieved. According to the bone cement injection device, the number of bone cement outlets and the injection position can be adjusted through relative rotation of the outer pipe and the inner pipe, and the first injection hole structure and the second injection hole structure are selectively aligned through rotation between the outer pipe and the inner pipe; therefore, at least one outlet or a combination form of two or more outlets can be formed in the tube body structure, the injection position and the injection amount of bone cement can be adjusted according to actual treatment work, and the functions of fixed-point injection and quantitative injection are achieved.

The invention provides a control method, device and system of an excrement cleaning system. Relates to the technical field of pet supplies. The control method comprises the following steps: determining a current state through a weighing sensing module and an infrared sensing module; if the current state is a defecation completion state, a screening and cleaning process is executed; the opening of the connected garbage bag is opened and corresponds to the position of the discharge port of the device; and after the screening and cleaning process is finished, the opening of the garbage bag for receiving the excrement is sealed through a sealing device. According to the control method of the excrement cleaning system, the excrement cleaning efficiency is improved through the automation technology, it is ensured that excrement directly falls into the garbage bag, environmental pollution and odor emission are reduced, and the air quality and the living comfort are improved. The intelligent control reduces the health risk and the maintenance cost, and improves the user satisfaction.

The invention discloses a built-in heat exchange double fluidized bed reaction device, which is used for a biomass raw material hydrogen production process, and comprises: a gasification chamber, which is of a cylindrical structure and is provided with a conical surface at the bottom, and the conical surface is provided with a hole for introducing bubbling fluidizing air; the combustion chamber is of a tubular structure and is arranged in the gasification chamber in a sleeved mode, the bottom of the combustion chamber is in an open state, and the combustion chamber is arranged in the conical surface area and used for introducing vertically-upward combustion-supporting air; the material returning units are arranged at the upper part of the reaction device, are uniformly arranged along the circumferential direction and are used for carrying the high-temperature bed material particles from the combustion chamber to an annular gasification area outside the combustion chamber and mixing the high-temperature bed material particles with biomass raw materials in the gasification area to produce hydrogen; the material returning unit is provided with a loosening chamber and a material returning chamber, and a bottom plate of the loosening chamber is obliquely arranged towards the material returning chamber. Through the built-in design of the double fluidized beds, the feeding pipe and the return feeder are prevented from being exposed at room temperature, and the heat loss of the reactor is reduced; and meanwhile, the device can provide enough regeneration time for the bed material under the condition of keeping a relatively high solid conveying rate.

The utility model provides a drainage structure of a carport, and belongs to the technical field of parking facilities. The problem that existing drainage stability is poor is solved. According to the drainage structure of the car shed, the car shed comprises a stand column which is vertically arranged and internally hollow and a frame connected with the stand column, the frame is located above the stand column and comprises an outer frame body and an inner frame body located in the outer frame body, the drainage structure comprises a drainage groove which is located between the outer frame body and the inner frame body and provided with an upward groove opening, and a through hole penetrating through the frame body is formed in the groove bottom of the drainage groove; the through holes communicate with inner cavities of the stand columns. The carport drainage structure has the advantage that the carport drainage stability is improved.

The invention discloses an on-line withstand voltage test device for transformer oil, relates to the technical field of electrical test instruments, and is used for testing the dielectric constant of the transformer oil. The device can be directly installed between the oil pumping pipe and the oil filling pipe of the transformer oil arc extinguishing on-load tap-changer without being carried back and forth, the automatic oil pumping device is designed, oil is directly pumped out of the transformer without being in contact with the outside, obtained detection data are accurate, and insulating oil is not wasted. The device consists of a transformer oil withstand voltage tester and an automatic oil pumping device, wherein a test unit is arranged in the automatic oil pumping device. The automatic oil pumping device is directly communicated with an oil pumping pipe and an oil injection pipe of the transformer oil arc extinguishing on-load tap-changer, so that totally-closed sampling and reinjection processes are realized. Exposure of an oil sample is avoided, the purity of an oil product is kept in the whole process, and then the accuracy of data is improved.

The invention relates to a drying system for a vehicle-mounted air supply unit and an integrated vehicle-mounted air supply unit, the drying system comprises a shell, a drying cavity, an air inlet and an air outlet are formed in the shell, the shell covers a motor shell, the drying cavity is filled with a drying agent, and the drying agent is arranged around the peripheral side of the motor shell. According to the drying system, adsorption and regeneration of the drying agent can be achieved, in addition, the motor shell is wrapped in the drying cavity and prevented from being directly exposed, the requirement for corrosion resistance of the motor shell is greatly lowered, and meanwhile radiation noise of the motor is also greatly lowered.

The utility model belongs to the technical field of cable production, and particularly relates to a cable stranding structure for cable production, which comprises a bottom plate, the top surface of the bottom plate is connected with an installation box, and the surface of one side of the installation box is connected with a motor. Through mutual cooperation of the electric push rod, the moving plate, the pulley, the vertical rod and the butterfly bolt, when the efficient cable stranding machine needs to move, the electric push rod is started, the movable end of the electric push rod drives the moving plate to move downwards, the pulley is made to make contact with the ground, and the pulley supports the efficient cable stranding machine. In this way, an operator can conveniently move the high-efficiency cable stranded wire through the pulleys, the situation that multiple persons need to carry the high-efficiency cable stranded wire manually is avoided, a protection mechanism is arranged, a blocking cover can shield and protect a motor by installing the blocking cover, the motor is prevented from being directly exposed in the environment, an object cannot directly collide with the motor, and the working efficiency is improved. Therefore, the protection performance of the motor is improved.

The invention provides a PQC and SM2 / 9 cooperative operation cryptographic chip and method based on an RISC-V architecture, and belongs to the technical field of cryptographic security. The chip comprises an RISC-V core and a configurable password collaborative operation unit, wherein the configurable password collaborative operation unit comprises a collaborative control state machine and a unified operation unit capable of being dynamically reconfigured. The method comprises the following steps: receiving and decoding a single cooperative operation instruction from an RISC-V core through a cooperative control state machine, and obtaining operation data feature information; the data length and the security level identification are extracted, and the optimal collaborative operation process is selected in a self-adaptive mode through comparison with a preset threshold value; and finally, dynamically configuring and scheduling a unified operation unit according to the selected process, and completing cooperative operation of the post-quantum cryptography algorithm and the SM2 / SM9 algorithm in an atomization mode. According to the method, deep fusion and intelligent scheduling of the two algorithms are realized on the hardware level, and the efficiency, the resource utilization rate and the safety of cooperative operation are improved.

The utility model relates to the technical field of medical film printers, in particular to a medical film printer with a disinfection function. According to the technical scheme, the device comprises a printing host, a printing operation area is arranged at the position, close to the upper surface, of the front surface of the printing host, side plates are symmetrically and fixedly installed at the positions, close to the two sides of the upper surface, of the front surface of the printing host, a top plate is fixedly installed on the upper surfaces of the side plates, and an ultraviolet lamp is fixedly installed on the lower surface of the top plate; a winding drum is fixedly mounted at the position, close to the front surface, of the upper surface of the top plate, a winding motor is fixedly mounted on one side of the winding drum, a winding shaft is rotatably mounted in the winding drum, a shielding curtain is fixedly connected to the outer surface of the winding shaft, and a gravity plate is fixedly connected to the tail end of the shielding curtain. According to the medical film printer, the printing operation area of the medical film printer can be disinfected conveniently, and a user is prevented from being infected by germs when using the printer.

The invention discloses a seedling culture monitoring device for forest cultivation, and belongs to the technical field of forest cultivation. The seedling culture monitoring device for forest cultivation comprises a base, a driving groove is formed in the top end face of the base, a belt is arranged in the driving groove, a pair of first gears is installed in the driving groove through bearings, and the two first gears are located in the two ends of the belt respectively; a second gear is installed in the driving groove through a bearing, a third gear is installed in the driving groove through a bearing, a transmission column is welded to the end face of the top of the third gear, a seedling raising box is welded to one end of the top of the transmission column, a stand column is welded to the end face of the top of the base, and a driving motor is in threaded connection with the outer wall of one side of the stand column. The problems that in the prior art, in the using process, illumination supplement cannot be conducted on saplings in time in the dark environment, sapling growth is not facilitated, the sapling cultivation effect can be reduced, and the cultivation time can be prolonged are effectively solved.

The utility model relates to the technical field of tools, in particular to a rotor assembly tool of an air conditioner motor, which comprises a workbench and a plurality of dies, the upper surface of the workbench is fixedly connected with an electric push rod, the output end of the electric push rod is fixedly connected with a top plate, and the inner wall of each die is connected with an iron core and a rotating shaft in a clamping manner. An adjusting structure is arranged on the surface of the workbench and comprises a rotating rod, the rotating rod is rotationally connected with the workbench, and a rotating plate is fixedly connected to the upper end of the rotating rod. According to the utility model, through the arrangement of the adjusting structure, when the rotor of the air conditioner motor is assembled, the rotating plate capable of rotating is utilized to drive the rotating shaft and the iron core to move, and then the top plate is utilized to extrude the rotating shaft, so that the rotating shaft is inserted into the iron core along the inner wall of the mold, thereby completing the purpose of assembling the rotor; therefore, the hand of the worker is prevented from being bruised, and potential safety hazards are eliminated.

The present invention relates to an electronic door lock with electric control and its application. The electronic door lock comprises a lock body, a lock core, a panel and a handle. The lock core is installed in the lock body, and the lock body and the panel are connected. The electronic door lock comprises a control mainboard, a data entry module and a handle body. The data entry module is arranged on the handle body, the control mainboard is arranged in the handle body, the data entry module is electrically connected to the control mainboard, a rotating cover is arranged on the handle body, the rotating cover is provided with a window for revealing the data entry module, and the rotation of the rotating cover makes the rotating cover cover or reveal the data entry module. The advantages of the present invention are that the data entry module is effectively protected, so that the data entry module is not exposed to the outside world when not in use, and the door handle can be prevented from colliding with the door frame or shifting, and it is more convenient for people to perform various operations on the panel.

The invention relates to a radar blindage auxiliary engineering system which comprises a main radar station and secondary radar stations arranged around the main radar station. The main radar station comprises an auxiliary assembly arranged in a mountain and a radar assembly arranged on the auxiliary assembly. The second-stage radar station is arranged on a mountain around the radar assembly; a secondary radar is arranged on the secondary radar station; when the radar assembly works, the secondary radar is started; the device is reasonable in design, compact in structure and convenient to use.

The invention discloses a MySQL database migration method and system based on a block file, and the method comprises the steps: enabling a snapshot file generation service to generate a snapshot for a source database directory, storing the snapshot in a designated local disk directory, and recording a timestamp generated by the current snapshot; the snapshot file transmission service transmits the snapshot to a target library server; the incremental data extraction service obtains a snapshot generation timestamp and analyzes an incremental log after the timestamp, binary data in the incremental log is converted into structured data, and the structured data is stored in a local disk directory; the incremental data conversion service is used for converting incremental structured data into standard DML statements of a database by identifying data operation content and analyzing to adapt to all field types; and reading and sequentially executing the DML statements through the incremental data writing service, and restoring the data of the source database to the target database. On the basis of block file migration, the thermal migration of the database is realized in combination with incremental logs.

The utility model provides a photoionization gas sensor and a portable photoionization gas detector, the photoionization gas sensor is characterized in that an upper gas chamber cover, an electrode circuit board, a lower gas chamber cover, a switching circuit board and an ultraviolet lampshade are fixedly connected through conductive bolts to form a closed cavity, and the ultraviolet lampshade is fixedly connected with an ionization chamber; meanwhile, the conductive bolts can serve as wires to be connected with a collecting electrode on the electrode circuit board and the control circuit board, so that the space is saved, and the electrical connection is more stable; the control circuit board is electrically connected with the conductive bolt and the ultraviolet lamp control panel by using the FPC flexible flat cable, so that the complexity of electrical connection is further reduced; meanwhile, the gas passage is arranged from top to bottom, so that the space of the ionization chamber can be utilized to the maximum extent, the irradiation area is increased while the ultraviolet lamp is prevented from irradiating the collecting electrode, the gas reaction is more sufficient, and the detection efficiency is further improved.

The invention relates to the technical field of block chains, and discloses a block chain data encryption query method, device, equipment and medium, the method comprises the following steps: extracting data content information of to-be-chained data, using a homomorphic encryption algorithm to encrypt the data content information to obtain ciphertext content information; taking the ciphertext content information and the corresponding ciphertext hash value as on-chain evidence storage data to be stored in a block chain in a chaining manner; performing association mapping on the on-chain evidence storage data and the ciphertext access rule through the smart contract to generate an authority association rule corresponding to the on-chain evidence storage data; performing permission verification on the access permission in the data query request based on a permission association rule; after the permission verification is passed, querying the on-chain evidence storage data in a homomorphic encryption state according to the data query request to obtain an encrypted query result; and decrypting the encrypted query result to obtain target plaintext query data. The reliability of data encryption query can be improved.