131results about How to "Avoid electromagnetic interference" patented technology

The invention discloses a full-tensor high-order magnetic field gradient sensing system and a use method, the full-tensor high-order magnetic field gradient sensing system comprises a magnetic field sensing probe, a non-metal directional support, a high-strength engineering plastic shell and a communication antenna, the magnetic field sensing probe comprises a pure wood support frame, 15 three-axis magnetic field sensors and a magnetic field acquisition processing communication module; the nine three-axis magnetic field sensors are distributed in an xy plane in a shape like a Chinese character'tian ', and the six three-axis magnetic field sensors are arranged in an xz plane in an upper row and a lower row. The magnetic field sensing probe is installed in the nonmetal directional support through the pure wood supporting frame, and the z-axis of the magnetic field sensing probe is always kept in a plumb downward mode. The plastic sealed shell is wrapped outside the directional support, and the communication antenna is covered on the shell. By adopting the full-tensor high-order magnetic field gradient sensing system and the full-tensor high-order magnetic field gradient sensing method, all first-order and second-order magnetic field gradient parameters can be obtained, so that accurate measurement is carried out.

The invention discloses an energy-saving and environment-friendly intelligent outdoor box-type substation, and belongs to the technical field of box-type substations, and the substation comprises a box-type housing, and the side wall of the box-type housing is provided with a heat dissipation window in a penetrating manner; the sealing assembly comprises a filtering mechanism and a drying mechanism, the filtering mechanism is installed at a port of the heat dissipation window and used for isolating and filtering out particle impurities in the air, the drying mechanism is arranged in the heat dissipation window in a sliding mode and used for adsorbing and removing water vapor in the air, and separation and combination with the filtering mechanism are achieved through sliding of the drying mechanism; the opening is used for opening or closing the radiating window; the flow guide assembly comprises a solar top cover and a fan; the rainfall assembly is arranged at the bottom of the outer edge of the solar top cover and located above the sealing assembly, and the rainfall assembly is used for synchronously driving the sealing assembly and the flow guide assembly during rainfall; and the water accumulation assembly is arranged on the outer side of the bottom of the box type shell and located below the sealing assembly, and the water accumulation assembly is used for locking the water falling assembly and sealing the sealing assembly when water is accumulated on the ground.

The invention belongs to the technical field of wire harness conduction detection, and particularly relates to a wire harness conduction detection device comprising a detection platform; the multiple groups of detection mechanisms are distributed above the detection platform in a linear array mode, each group of detection mechanism comprises two mounting frames symmetrically arranged above the detection platform, and the two mounting frames are internally provided with test terminals communicated with the two ends of a wire respectively; and the multiple sets of self-adaptive clamping mechanisms are arranged, are used in cooperation with the mounting frames correspondingly and are used for conducting self-adaptive clamping and fixing on the wires according to the diameters of the wires. By arranging the self-adaptive clamping mechanism, the wire can be clamped and fixed in a self-adaptive manner according to the diameter of the wire, the fixing effect on the wires with different diameters in the wire harness is improved, the stability of wire connection is improved, and the influence on conduction detection of the wire is avoided.

The invention relates to the technical field of cables, in particular to an airtight cold-resistant low-smoke flame-retardant instrument cable used in an explosive environment, which comprises a protective sleeve, a cable body mechanism is arranged in the protective sleeve, the cable body mechanism comprises inner sheaths, and a plurality of inner sheaths are uniformly mounted in the protective sleeve at equal intervals. According to the invention, heat dissipated in the use process of the cable can be utilized to preheat the main body structure of the cable, so that the cold resistance of the cable is improved while internal heat dissipation is promoted; according to the invention, the structure of the cable is improved, the connection stability among the structures of the cable can be improved, the air tightness of the cable is effectively improved, the throttling effect of the heat insulation shell and the guide ring can be fully utilized, the flame retardance of the cable is improved, the cable can be better matched with the external environment, and the application range of the cable can be effectively expanded while the working stability of the cable is improved.

The utility model discloses a skin protecting and supporting device of a traditional Chinese medicine external treatment box, which comprises a connecting containing cylinder which is of an integral structure and is made of elastic materials, and an external expansion cover positioned at the lower end of the connecting containing cylinder. An upper protruding ring, an annular groove, an annular side wall and a moxibustion therapy box supporting ring are sequentially machined on the inner wall of the connecting containing cylinder from top to bottom. The inner diameter of the upper protruding ring is smaller than that of the annular side wall, the inner diameter of the annular side wall is smaller than that of the annular groove, and the inner diameter of the treatment box supporting ring is smaller than that of the annular side wall. The outer edge of the outer expansion cover is located on the outer side of the outer wall of the connecting containing cylinder and is lower than the inner edge. By means of the device, the traditional Chinese medicine external treatment medicine cake box is fixed to the lower side of the cylinder bottom plate, the device has the advantage of being convenient to disassemble and assemble, and electromagnetic interference cannot be generated on a storage communication element; a skin protecting and supporting device is additionally arranged between the moxibustion fumigation traditional Chinese medicine external treatment device and the skin at the body acupoints, and conversion of moxibustion therapy modes can be achieved.

The utility model relates to the field of signal acquisition, in particular to a signal acquisition structure with a signal shielding protection structure. The technical problem is that in the process of collecting weak signals, a conductive material is used for wrapping a signal collector to form a Faraday cage effect, so that a method for blocking external electromagnetic interference may cause certain influence on target signals, and thus the collection result may be slightly influenced. According to the technical scheme, the signal acquisition structure with the signal shielding protection structure comprises a heat dissipation assembly, a heat conduction assembly and an anti-interference assembly. By arranging the adjustable shielding device and the built-in heat dissipation system, the equipment can flexibly adjust the contact area between the signal receiving assembly and the outside, so that the acquisition effect is prevented from being influenced by insufficient target signal strength, and meanwhile, the built-in heat dissipation system can reduce the internal temperature of the equipment in real time, so that the acquisition efficiency is improved. Efficient operation in the signal acquisition process is ensured, and performance reduction caused by overheating is prevented.

The invention relates to a surface discharge stage judgment device and method based on ultrasonic propagation, and the method comprises the steps: simulating a surface discharge phenomenon with an insulation fault, and generating various characteristic parameter changes of an insulation fault surface discharge electric signal; various characteristic parameter change signals of the sound signals caused by insulation fault surface discharge electric signal changes are obtained in real time, the influence of a sound propagation path on the sound signals is combined, the various characteristic parameter change signals are converted into computable data, and characteristic data are extracted; and the creeping discharge stage judgment module judges the creeping discharge stage of the insulation fault in combination with the detection data obtained by the ultrasonic propagation detection module and the oscilloscope. Compared with the prior art, the method has the advantages that the ultrasonic propagation influence is considered, and accurate and reliable judgment of the creeping discharge stage is realized based on various characteristic parameter changes of the acoustic signal caused by various characteristic parameter changes of the creeping discharge signal.

The utility model relates to the technical field of touch screens, and discloses a touch screen with an anti-electromagnetic interference function, which comprises a shielding shell, a supporting bottom plate is movably connected to the inner bottom of the shielding shell, OCA optical cement is fixedly connected to the top of the supporting bottom plate, an ITO lower film layer is fixedly connected to the top of the OCA optical cement, and an ITO upper film layer is fixedly connected to the bottom of the supporting bottom plate. An isolation layer is fixedly connected to the top of the ITO lower film layer, the shielding shell comprises a shielding shell body, transverse shell plates are fixedly connected to the front face and the back face of the top of the shielding shell body, longitudinal shell plates are fixedly connected to the two sides of the top of the shielding shell body, and fixing screws are fixedly connected to the tops of the two sides of the transverse shell plates; an interface slot is formed in the middle of one side of the shielding shell; according to the utility model, the touch screen body is fixed in the shielding shell, and the transverse shell plate and the longitudinal shell plate are fixed on the four sides of the top of the shielding shell by using the fixing screws, so that the touch screen can be protected through the shielding shell, and electromagnetic interference is prevented.

The invention discloses an electromagnetic interference real-time elimination method, and relates to the technical field of magnetic resonance imaging. The method comprises the following steps: acquiring calibration data; obtaining a convolution kernel based on the calibration data, and determining a convolution kernel coefficient; determining a frequency domain coefficient based on the convolution kernel coefficient; original data are collected, Fourier transform is carried out to obtain corresponding frequency domain data, and the frequency domain data comprise induction coil frequency domain data and receiving coil frequency domain data; and based on the frequency domain coefficient and the frequency domain data of the induction coil, performing frequency domain weighted summation to obtain estimation of the frequency domain of the electromagnetic interference signal of the receiving coil, and based on the estimation, performing elimination from the frequency domain data of the receiving coil to realize electromagnetic interference elimination. According to the method, the convolution operation is replaced by the frequency domain weighting sum, the calculation efficiency is improved, and real-time and stable electromagnetic interference elimination can be realized.

An electronic cigarette radio frequency source device comprises a radio frequency function board and a shielding isolation frame fixedly connected to the radio frequency function board. The system function board is fixedly connected to the shielding isolation frame and located on the side, away from the radio frequency function board, of the shielding isolation frame; wherein an accommodating space is formed among the radio frequency function board, the shielding isolation frame and the system function board, a shielding partition plate group is integrally formed on the shielding isolation frame, and the accommodating space is divided by the shielding partition plate group. The accommodating space is divided by the shielding partition plate group, and the accommodating space in the device is divided into a plurality of areas, so that the areas in the accommodating space can effectively avoid mutual electromagnetic interference. The design that the radio frequency function board is located on the side, away from the system function board, of the shielding isolation frame, the containing space is formed among the radio frequency function board, the shielding isolation frame and the system function board, and radio frequency radiation is sealed in the containing space is adopted, so that the electromagnetic compatibility between a circuit on the radio frequency function board and a circuit on the system function board is improved.

The invention relates to a conductive and electromagnetically shielding polyaryletherketone-based composite material and a preparation method thereof, comprising the following steps: S1, forming a mixed dispersion of a carbon-based MFI structure molecular sieve and a metal salt, and performing a heating reaction to obtain a loaded carbon-based MFI structure molecular sieve; S2, uniformly mixing the loaded carbon-based MFI structure molecular sieve and polyaryletherketone, and then performing melt blending, extrusion, and granulation to obtain a first material; S3, uniformly mixing a conductive filler and polyaryletherketone, and then performing melt blending, extrusion, and granulation to obtain a second material; S4, mixing the first material and the second material according to a proportion, and then performing melt blending, extrusion molding or granulation to obtain a conductive and electromagnetically shielding polyaryletherketone-based composite material; the composite material of the invention has significant electromagnetic shielding effectiveness and excellent comprehensive mechanical properties.

The invention provides a liquid viscosity measuring device and method.The device comprises a measuring container used for containing liquid to be measured, the top face of the measuring container is in a cone shape extending outwards, a closed control cavity is formed in the top end of the measuring container, and the inner diameter of the control cavity is smaller than the diameter of a measuring steel ball; the measuring steel ball is arranged in the measuring container; the rotating mechanism is used for driving the measuring container to rotate by 180 degrees around the horizontal axis of the measuring container, so that the measuring container is switched between an upright state and an inverted state; one end of the control cavity is directly communicated with the interior of the measuring container, the other end of the control cavity is communicated with the interior of the measuring container through a first pipeline provided with a first stop valve, and the other end of the control cavity is further provided with a pressure relief device used for adjusting the internal pressure of the control cavity. According to the invention, the ball falling time can be accurately measured, so that the liquid viscosity measurement precision is improved.

The utility model relates to vehicle sensor technical field, and disclose a kind of vehicle over-the-horizon obstacle detection device. Including vehicle body, it is characterized in that, still include: fixed mounting frame, radar signal processing module, millimeter wave radar, the vehicle body bottom is fixedly installed with fixed mounting frame, the inboard of fixed mounting frame is fixedly installed with radar signal processing module, the inboard of fixed mounting frame is fixedly installed with millimeter wave radar, the fixed mounting frame contains frame main body, the frame main body both sides symmetry fixed mounting have steerable wide-angle camera, the steerable wide-angle camera, one end fixed mounting have evenly distributed fifteen mounting frame door, it is favorable to provide impact resistance and anti-deformation mechanical protection, ensure the security of internal precision component under bad road condition, and the mounting frame door installed thereon uses quick release design to facilitate maintenance replacement.

This utility model discloses a rotating card holder with a function to isolate mutual interference between two card signals. It includes two flaps, each rotatably mounted in a receiving groove via a rotating shaft. An anti-interference plate is fixedly installed between the two receiving grooves on the card holder body. A rectangular opening is formed on the surface of each flap, and a leather card holder is fixedly installed within the opening. An elastic locking mechanism is installed on the front side of the card holder body to lock the two flaps. This utility model card holder has two rotatable flaps. When a card is inserted into the card slot near the outer side of the leather card holder, the elastic locking mechanism ensures a stable connection between the flaps and the card holder body, preventing the card from falling out of the card slot. The anti-interference plate absorbs circuit noise and eliminates electromagnetic interference, preventing mutual interference between the signals of the two leather card holders and ensuring that the signals of the inductive cards can be read smoothly.

The present invention relates to the field of antenna image processing technology, and is a method and system for controlling an antenna support frame based on image detection in an electromagnetic environment, comprising: constructing a support frame control system, using the support frame control system to obtain an original received signal set and an antenna operation image, identifying the antenna key parts of the antenna operation image to obtain a candidate grayscale image group, determining a target support frame image and a target antenna image in the candidate grayscale image group, and obtaining a signal stability factor based on the original received signal set. If the signal stability factor is less than a standard stability factor, the antenna azimuth is controlled to obtain an adjustable support frame, and the above steps are repeated until the signal stability factor is not less than the standard stability factor. The present invention can improve the accuracy and efficiency of antenna support frame control.

This application relates to the field of household appliance technology, and in particular to a refrigerator pressure switch and a refrigerator. A refrigerator pressure switch includes: a pressure switch assembly and a pressure transmission assembly. The pressure switch assembly is disposed on the refrigerator body; the pressure transmission assembly includes a base and a button. The base is mounted on the refrigerator body, the button is located on the base and sealed to the base, and the end of the button away from the base is disposed against the refrigerator door. The button and the base enclose a cavity, and the cavity is connected to the pressure switch assembly. The button retracts the base in response to displacement of the refrigerator door, forcing gas in the cavity into the pressure switch assembly, causing a pressure change within the pressure switch assembly. The pressure switch assembly responds to the pressure change to control the opening of the refrigerator door. This application, by additionally providing a pressure transmission assembly, can prevent condensation from occurring on the pressure switch assembly.

The invention relates to the technical field of vehicle-mounted communication, in particular to a vehicle-mounted network architecture, a signal transmission method and a vehicle, and the vehicle-mounted network architecture comprises a plurality of area controllers and a vehicle control platform; the plurality of area controllers are all in direct communication connection with the vehicle control platform through a power line, and any area controller is at least in direct communication connection with another area controller through a power line, so that a plurality of transmission paths are arranged between any area controller and the vehicle control platform; and the vehicle control platform is used for determining a target transmission path for signal transmission and / or power transmission according to the state of each transmission path, so that the stability of vehicle-mounted communication and power supply is improved.

The present application relates to the technical field of spacecraft propulsion system, and more particularly to a micro-newton hybrid mode propulsion system and method based on gas working substance. The system comprises a gas storage unit, a gas supply unit, a thruster unit and a propulsion system driving and control unit. The gas storage unit adopts symmetrically arranged high-pressure gas cylinders connected through high-pressure isolation valves, and in combination with the automatic balancing strategy of the control unit, effectively solves the problem of on-orbit centroid drift. The gas supply unit includes parallel cold gas propulsion branches and electric propulsion branches, and each branch adopts a mechanical pressure reducer to eliminate vibration and noise caused by electromagnetic valve action from the source, realizing super-static operation of the system. The propulsion system driving and control unit controls the micro-newton cold gas thruster and the micro-newton electric thruster to work alone or in cooperation according to the distribution strategy based on the thrust critical point, realizing the optimal comprehensive efficiency of high precision and high specific impulse in the full thrust range, and being suitable for ultra-high precision space scientific exploration missions.

The invention discloses an unmanned aerial vehicle hanging heavy load mechanical ground wire installation device, and belongs to the technical field of unmanned aerial vehicle application, the unmanned aerial vehicle hanging heavy load mechanical ground wire installation device comprises an unmanned aerial vehicle and a rope, the rope is connected below the unmanned aerial vehicle, a lifting hook is installed below the rope, a battery is arranged in the unmanned aerial vehicle, and a supporting frame is installed at the bottom of the unmanned aerial vehicle. According to the invention, by combining the unmanned aerial vehicle and the mechanical device, the installation time of the grounding wire is greatly shortened, and the installation can be completed within 40 minutes generally, so that the working efficiency is improved. The number of required operators is reduced, the labor cost is reduced, the physical output of the operators is reduced, and fatigue and potential accidents caused by too long working time are avoided. The device is suitable for ground wire installation in various complex environments, is not influenced by electromagnetic interference and distance, and has a wide application range and strong practicability.

The application discloses a device and method for collecting 120-channel I2C data, which comprises a main control board and 24 sub-control boards with the same structure and connected with the CPU of the main control board. After the system is powered on, the main control board groups the 120-channel I2C data to be collected, accesses the I2C data collection of the specified address through the I2C interface of the system, or collects the 120-channel I2C data according to the polling sequence set by the software, collects the temperature, voltage and power information data in each channel of the I2C data, and completes the local reporting or remote reporting, thereby successfully completing the collection and reporting functions and not causing electromagnetic interference to other high-speed signals processed and transmitted in the system. The device has simple structure and low cost. The method is convenient to operate, can avoid the electromagnetic interference of the multi-channel I2C data collection to other signals in the complex circuit system, and can improve the efficiency and quantity of data collection.

The present application relates to the technical field of connector, especially to an electric connector assembly. The electric connector assembly comprises a shell, a PCB adapter plate is arranged in the shell, two or more rows of non-ground cables are electrically and fixedly connected to the PCB adapter plate, two or more rows of connecting pads are arranged on the front and back surfaces of the PCB adapter plate respectively, each row of connecting pads comprises a row of signal pads and ground pads, the core wire of the non-ground cable is electrically and fixedly connected to the signal pad on the front surface, the conductive outer sheath is electrically connected to the ground pad on the front surface, the signal pad and the ground pad on the back surface are used for being electrically connected to the corresponding terminals of a PCB female plate or being electrically connected to the corresponding terminals of an adapter socket and then being electrically connected to the PCB female plate, the PCB adapter plate is internally arranged with a conductive circuit to correspondingly connect the connecting pads on the front and back surfaces of the PCB adapter plate, and the electric connector assembly further comprises a load bottom support which is locked and connected to the shell. The electric connector assembly can realize multi-row high-density wiring and greatly improve the performance of the connector.

The invention discloses a cantilever type automatic loading device, which belongs to the field of liquid loading and unloading arms and comprises a stand column, a loading arm body is arranged on one side of the stand column and comprises a liquid-phase inner arm, a liquid-phase outer arm and a plumbing arm which are connected in sequence, and the liquid-phase inner arm and the liquid-phase outer arm are connected through a bent pipe and a rotary joint. The liquid-phase inner arm, the liquid-phase outer arm and the bent pipe are all double-layer sleeves, a plurality of temperature control heating modules are arranged in the inner sleeve, an electromagnetic coil is arranged between the inner sleeve and the outer sleeve, and after the electromagnetic coil is powered on, an alternating magnetic field can be generated to penetrate through the inner sleeve to inductively heat the temperature control heating modules so as to heat a medium in the inner sleeve. Materials can be rapidly heated to a flowing state, and the loading efficiency is improved. Meanwhile, due to the fact that the heating process is accurate and controllable, it can be guaranteed that the materials are kept at the stable temperature in the conveying process, the solidification or blocking problem caused by temperature fluctuation is solved, and the heating device has remarkable advantages and wide application prospects in practical application.

The utility model relates to the technical field of medical treatment, in particular to a medical endoscope wireless isolation protection device which comprises a transmitting end and a receiving end. The transmitting end comprises an image sensor module, a high-speed serializer and a millimeter wave wireless transmitting module which are connected in sequence; the receiving end comprises a millimeter wave wireless receiving module, a high-speed deserializer, an image processing unit and a display storage module which are connected in sequence; a traditional copper cable is replaced by millimeter wave wireless transmission, high-speed data transmission is achieved, a physical electrical isolation barrier is established, a ground loop and electromagnetic interference of traditional wired transmission are eliminated, meanwhile, a high-speed serial interface is adopted, the number of data lines is reduced during transmission, and signal attenuation is reduced.

The utility model relates to the technical field of automobile parts, in particular to a distribution box with an anti-interference structure, which comprises an outer top cover, four corners of the bottom of the outer top cover are clamped at the top of an inner top cover, the bottom of the inner top cover is inserted into the inner wall of a box body, and a metal partition plate is arranged on the bottom wall of the inner wall of the box body. A metal baffle is arranged at the top of the metal partition plate, a plurality of through holes are formed in the bottom of the box body, mounting bases are arranged at the four corners of the bottom of the box body, damping springs are fixedly mounted in the mounting bases, and heat dissipation holes are formed in the outer wall of one side of the box body. According to the improved distribution box, a layer of metal net is arranged between the outer top cover and the inner top cover, the metal net can destroy an electric field formed by electronic elements, so that interference resistance is effectively carried out, and the metal partition plates and the metal baffles arranged in the box body can be combined into a complete shielding space, so that the shielding effect is improved. And electromagnetic interference among the electronic components can be prevented.

The invention discloses a liquid leakage detection line, a liquid leakage detection system and a liquid leakage detection method, and relates to the technical field of detection. The method comprises the following steps: configuring a first connector and a second connector in the liquid leakage detection line to be respectively communicated with an external power supply system so as to realize power-on connection of an induction line in the liquid leakage detection line; an induction line is arranged to be in contact with a to-be-detected area on the board card; in response to liquid leakage of the to-be-detected area, the leaked liquid sequentially permeates into the second insulating layer, the metal woven mesh layer, the first insulating layer and the metal core body in the induction line, so that the induction line detects the output voltage of the to-be-detected area; comparing the output voltage of the to-be-detected area with a preset voltage, when the output voltage is smaller than the preset voltage, obtaining an output result that the high level is changed into the low level, and confirming that the to-be-detected area leaks liquid. According to the liquid leakage detection line, through the structural design that the ring layer structure is combined with the metal woven mesh in the liquid leakage detection line, electromagnetic interference caused by a board card is avoided, and accurate detection of the liquid leakage condition is achieved.

The utility model discloses a plasma generator and refrigeration equipment, the plasma generator comprises an insulation support, and an electromagnetic shielding member and an ionization unit which are arranged on the insulation support, the electromagnetic shielding member and the insulation support are combined to form an electromagnetic shielding cavity, and the ionization unit is arranged in the electromagnetic shielding cavity. The ionization unit comprises at least one group of collector modules and electrode modules which are oppositely arranged at intervals, and the collector modules and the electrode modules are matched to ionize air and generate flowing airflow. According to the utility model, the electromagnetic shielding cavity formed by the electromagnetic shielding member and the insulating support can effectively prevent electromagnetic interference caused to external equipment or parts when the ionization unit works, thereby improving the use safety.

The utility model discloses a case assembly, and belongs to the field of computer equipment. The problems that the case is subjected to electromagnetic interference and the environmental adaptability is poor are solved; according to the technical scheme, the computer case comprises a case body, and the case body comprises a first panel, a second panel, a third panel and a temporary module; a plurality of first fans and a plurality of first grooves are arranged on the first panel, a plurality of second grooves are arranged on the second panel, detachable external modules are arranged on two sides of the second panel, a temporary module replacement window and a handle are arranged on the third panel, and peek coatings are sprayed in the first grooves and the second grooves. A first groove is formed in the case body, a second groove is formed in the case body, an internal module is placed in the first groove, a plurality of heat dissipation columns are arranged on the internal module, protrusions matched with the first groove and the second groove are arranged on the internal module, an iridescent conductive oxidation film is arranged at the splicing position of the case body, and the case body further comprises an insertion connector. The plugging connector is provided with a conductive rubber pad and a conductive rubber sealing strip. The utility model is applied to the case.

The utility model provides a blade type rotating speed sensor, which comprises a rotating shaft positioned in an engine, a plurality of fan blades arranged at the tail part of the rotating shaft and rotating along with the rotating shaft, a light-transmitting part arranged on the rotating shaft in a penetrating manner and enabling the rotating shaft to be provided with two ports, and two fixing parts arranged on the rotating shaft and not rotating along with the rotating shaft, a protection part covering the rotating shaft is connected between the two fixing parts, two through holes are formed in the protection part corresponding to the light-transmitting part, one through hole is provided with a transmitting part, the other through hole is provided with a receiving part, and when the light-transmitting part right faces the receiving part, the receiving part can receive signals transmitted by the transmitting part. According to the blade type rotating speed sensor, when the rotating shaft rotates for two circles, two-time signal transmission is completed, so that the rotating speed of the fan blades can be acquired, the blade type rotating speed sensor is stable and reliable, electromagnetic interference can be avoided, and improvement of stability and reliability in the information acquisition process is facilitated.

The utility model provides a mainboard integrated with an antenna and an entrance type scanner, the mainboard integrated with the antenna comprises at least one antenna assembly and a mainboard, and the antenna assembly is integrated on the mainboard; the mainboard comprises at least one antenna clearance area, each antenna assembly is arranged at the edge of one antenna clearance area, the antenna clearance area is arranged on the side wall of the end part of the mainboard, and the antenna clearance area is an area without any metal material; the antenna assembly comprises a microstrip line, a chip capacitor and a chip inductor, and the microstrip line is sequentially connected with the chip inductor, the chip capacitor and the grounding end of the mainboard; the chip capacitor is used for adjusting the resonant frequency of the antenna; the chip inductor is used for adjusting impedance matching of the antenna. The antenna is internally arranged, space is saved, the health protection requirement of a user is met, flexible adjustment of the antenna radiation frequency and impedance matching is achieved by arranging the capacitor and the inductor, and the antenna transmission efficiency is improved.

The utility model provides a new energy automobile enhanced heat dissipation cable, which relates to the technical field of cables, and comprises an integral structure and auxiliary structures, and the auxiliary structures are located at the front and rear positions of the top of the integral structure; the overall structure comprises a conductor body, a first heat dissipation layer is fixedly connected to the center of the outer surface of the conductor body, a second heat dissipation layer is fixedly connected to the center of the outer surface of the first heat dissipation layer, and a plurality of evenly-distributed water cooling pipes are arranged on the inner surface of the second heat dissipation layer in a penetrating mode. A user can pour water into the water cooling pipe through the water injection pipeline, the water finally flows into the water cooling pipe and flows through the pipeline, heat generated by the conductor body can be taken away in time, accumulation of heat in the cable is avoided, the heat can be well dissipated through mutual cooperation of the first heat dissipation layer and the second heat dissipation layer, and the service life of the cable is prolonged. Therefore, the overall heat dissipation effect is improved.