36 results about "Through transmission" patented technology

The invention provides a bolt pre-tightening force monitoring system and method based on multi-strain force acquisition, and the system comprises a plurality of foil strain gauges which are uniformly arranged at the end part of a bolt; the temperature compensation strain gauge is arranged at the center of the end part of the bolt; the signal processing part is in signal connection with the foil type strain gauges and the temperature compensation strain gauge; and the transmission part is electrically connected with the signal processing part. The pre-tightening force of the bolt can be monitored in real time, measurement errors are avoided, so that multi-dimensional strain information of the bolt can be obtained, the multi-dimensional strain information is processed through the signal processing component, more accurate strain information can be obtained, and the accuracy of the bolt is improved. The pre-tightening force dynamic change, caused by load change, vibration relaxation and the like, of the bolt is accurately captured, and the pre-tightening force change can be transmitted through the transmission component, so that a worker can monitor and know the bolt strain condition in real time.

According to the conveyor belt capable of dissipating heat, after being welded, a radar is conveyed to an air tightness detection station through the conveyor belt to be subjected to air tightness detection, the radar which is just welded carries a large amount of heat due to the fact that the radar is affected by welding, and due to the fact that the conveyor belt is provided with a plurality of heat dissipation holes, the heat dissipation efficiency is greatly improved. The heat dissipation holes can help ventilation of the upper portion and the lower portion of the radar, heat dissipation of the radar is achieved, when the radar with the temperature is conveyed to the position above the heat dissipation fan, the heat dissipation fan blows air to the radar, the radar with the temperature is further cooled under the action of the heat dissipation fan, and when the radar is conveyed to an air tightness detection station, the temperature is reduced, and the radar is cooled. The transmission belt helps the welded radar to be cooled so as to eliminate inaccurate airtightness test caused by high temperature.

The invention discloses a reflection amplitude characteristic matched simple calibration-free dielectric constant measurement method, which comprises the following steps of: outputting a continuous wave with continuously changing frequency through a signal generator, enabling the continuous wave to enter a rectangular waveguide in which a sample to be measured is placed through a power divider, and enabling the sample to be measured and an electromagnetic field to interact to generate a reflection signal; the reflected signals are transmitted to a detector after passing through a power divider, the reflected signals are collected, and a reflection amplitude actual measurement curve is obtained; a reflection amplitude theoretical curve is generated through the NRW transmission theory based on the dispersion model, curve matching optimization is conducted through a search algorithm, the Euclidean distance between a reflection amplitude actual measurement curve and the reflection amplitude theoretical curve is calculated iteratively, and an optimal parameter combination is obtained; and substituting the optimal parameter combination into the dispersion model to obtain the dielectric constant of the tested sample.

The utility model relates to the technical field of lane monitoring equipment, and discloses monitoring equipment for an intelligent distribution device based on a variable lane. The convenient maintenance mechanism is arranged on the cross beam, and the convenient maintenance mechanism is used for facilitating safety maintenance work of a user; and the stable clamping mechanism is arranged on the convenient maintenance mechanism, and the stable clamping mechanism is used for improving the stability of shooting. Through the overall design of the convenient maintenance mechanism, the stepping motor is controlled to work, the rotating disc can be driven to rotate, and through transmission of the first connecting rod, the overall connecting cylinder, the second connecting rod and the connecting frame, the camera body can be driven to rotate with the rotating disc as the circle center, so that the camera body tends to move on the ground; and the user can maintain the camera main body on the ground, climbing maintenance is not needed, and the safety and efficiency of maintenance work are improved.

The utility model discloses a gear transmission sounding pipe dredging device. The gear transmission sounding pipe dredging device comprises a supporting frame body, a drilling device frame body and a conveying device frame body. The supporting frame body is fixed to an area to be constructed, the drilling device frame body is arranged on the supporting frame body, and two rack rails are oppositely arranged on the inner side of the drilling device frame body. The transmission device frame body is movably fixed on the drilling device frame body and is meshed with the rack track through transmission gears arranged at the two ends of the transmission device frame body; a drill rod transmission device, a torque output device and a drill rod joint are arranged on the transmission device frame body, the drill rod transmission device is in transmission connection with the torque output device through a belt transmission structure, and the torque output device is in rigid connection with the drill rod joint; the bottom end of the drill rod connector is connected with a plurality of drill rods used for dredging the sounding pipe. And through the structural arrangement of the sounding pipe dredging device, the stability of the device is improved, and object strike accidents caused by failure and falling of the device are effectively prevented.

The invention discloses an online monitoring method and system for water leakage of a water source pipeline of an extra-high voltage converter station. The method comprises the steps that ultrasonic flowmeters are arranged at a first monitoring point and a second monitoring point of the water source pipeline of the extra-high voltage converter station respectively; the water consumption W1 and the water consumption W2 of the first monitoring point and the second monitoring point are calculated through the ultrasonic flow meter based on a time difference method, and the water consumption W1 and the water consumption W2 are transmitted to a monitoring cloud platform through 5G; calculating a water consumption difference value delta W of the first monitoring point and the second monitoring point through the monitoring cloud platform based on the water consumption W1 and the water consumption W2; and judging whether the water source pipeline of the extra-high voltage converter station leaks water or not through the monitoring cloud platform based on the water consumption difference value delta W and a set alarm fixed value K. According to the technical scheme, the difference value of the water consumption of an outlet of a pump room outside the station and an inlet in the station within 24 hours is calculated in real time through a time difference method, the water leakage amount of the pipeline is dynamically judged, and the function of timely finding out potential safety hazards of a water source outside the extra-high voltage converter station is achieved.

The underwater wiper camera provided by the application comprises an underwater camera, a transmission cable and a display device; the underwater camera is connected with the display device through the transmission cable; the cable is a twisted pair cable for signal transmission, and has good stability, strong anti-interference performance and high transmission speed in actual application; the cable sheath is made of imported polyurethane, has high corrosion resistance and can be used in a special seawater environment; a wiper assembly is used for cleaning the protective lens, can effectively and continuously keep the lens clean; the protective lens covers and seals the first end portion; the shooting direction of the camera is towards the protective lens; an LED lamp assembly surrounds the camera shooting end periphery, and is located in the shell; the camera is connected with the display device through the transmission cable. The underwater wiper camera provided by the embodiment of the application adopts mechanical rigid sealing, has compact structure and good sealing.

A sound insulator includes the space forming portion which have an introduction portion that forms a transmission space for transmitting sound waves and introduces sound waves into the transmission space and a discharge portion for guiding the sound waves introduced into the transmission space to the outside of the transmission space. The sound insulator includes a phase adjustment portion that attenuates sound waves corresponding to the frequency of the sound waves whose phases have been changed among the sound waves transmitted through the transmission space by changing the phase of some of the sound waves transmitted through the transmission space. The phase adjustment portion changes the frequency band of the sound wave whose phase is to be changed.

A sonar method and assembly for detecting and / or determining the position and / or speed of objects underwater and / or on the water in a specified region. The orthogonality of Doppler-shifted transmission sequences is explored. First, a transmission sequence is generated, spread for some possible Doppler shifts and output via the transmission elements. If the transmission sequence is chosen carefully, the spread versions become orthogonal to each other and enable MIMO signal processing. If one of the assumed spreads matches the speed of the object, the spread is canceled out again to form the original transmission signal. This allows the binary detection of the presence of an object with the correlation of only one sequence and reduces the computing effort at the respective receivers enormously.

The utility model discloses a kind of mute door groups in the technical field of acoustics engineering, including door frame, the door frame inside is connected with door panel by hinged installation, first lock tongue accommodating slot is opened in the right edge of the door panel inside, the position of the door frame corresponding to door panel first lock tongue accommodating slot is equipped with second lock tongue accommodating slot in its and the inside surface of door panel bonding;The door panel inside is equipped with a transmission groove with specific bending line, by setting transmission groove, transmission ball and other structures between door frame and door panel and reasonable layout, reach accurate stable locking purpose.Compared with traditional mechanical lock, avoid rebound sound, do not destroy quiet atmosphere, compared with magnetic attraction lock, not affected by environmental humidity and frequent opening and closing, not demagnetization, guarantee door lock suction force and security performance.When door panel is closed, trigger slider drives lock tongue to insert into slot through transmission ball, reset spring helps reset, make locking reliable, convenient operation, improve door group safety, durability and practicality.

The invention relates to the technical field of field management, and discloses a monitoring device for field management, which comprises a bottom plate and an electric cylinder, and is characterized in that a monitor and a temperature and humidity sensor can acquire data in real time at multiple angles, and the data is visually presented in video and chart forms after being wirelessly transmitted to external equipment, so that a worker is assisted to quickly master a field state; aiming at the monitored abnormal position, the system can automatically put a marking plate for marking, a buzzer arranged in the marking plate can further assist a worker in rapidly positioning the abnormal position, a driving motor drives a driven gear to rotate, then a driving wheel and a mounting ring are driven to synchronously run, and a belt strip rotates through transmission of a friction block; the electric push rod pushes the transverse rod to move downwards, so that the conduction wheel is tightly attached to the inner side of the belt strip, the grounding area of the device can be increased after the caterpillar band makes contact with the ground, and after escape is completed, the electric push rod drives the transverse rod to move upwards, so that the conduction wheel is disengaged from the belt strip, and the contact area of the device and the ground is reduced to reduce energy consumption of the device.

A diagnostic site determination unit receives a plurality of ultrasound images successively acquired through transmission and reception of ultrasonic waves and determines a diagnostic site represented by each of the plurality of ultrasound images. An examination situation determination unit determines a situation of an examination using the ultrasonic waves based on a temporal change in a degree of certainty of the determination of the diagnostic site.

The utility model discloses an ROV position and posture adjusting device for offshore wind power underwater detection, which relates to the technical field of wind power detection and comprises a detection equipment body, lifting propellers are mounted on the front and back of the left and right sides of the detection equipment body, and front and back propellers are mounted on the left and right of the rear side of the detection equipment body. The upper side of the rear part of the detection equipment body is fixedly provided with a steady flow seat, the upper side of the steady flow seat is rotatably connected with a round seat, and the upper side of the round seat is fixedly provided with a vertical rudder wing. The rudder wing driving module, the flow direction sensing module and the attitude control unit are integrated, the incident flow angle is adjusted in real time through transmission linkage of the cross-shaped rudder wing and the gear, the attitude stability of the ROV in different water flow environments is ensured, and compared with a traditional multi-propeller scheme, the device remarkably reduces energy consumption and reduces cost. And through the synergistic effect of passive adjustment and active propulsion of the rudder wings, water turbidity caused by disturbance of the propellers is reduced, the optical camera shooting and sonar imaging definition is improved, and therefore it is guaranteed that the posture of the ROV is rapidly adjusted under the dynamic water flow, and tasks are stably executed.

The invention relates to the field of disc gear detection, in particular to a detection sorting machine for disc gear production, which comprises a detection support, a transmission manipulator is movably mounted on the right side of the top of the detection support, a spring pressing rod is fixedly connected to the left side of the top of the detection support, and a gear detection head is fixedly connected to the movable end of the spring pressing rod. And a tooth missing detection mechanism is movably connected between the bottom of the gear detection head and the inner wall of the detection support. According to the detection sorting machine for disc gear production, through cooperative use of the transmission manipulator, the tooth missing detection mechanism, the tooth pitch detection mechanism and other components, in the process that the transmission manipulator clamps a disc gear and then drives the tooth missing detection mechanism to operate, the tooth missing detection mechanism and the tooth pitch detection mechanism are linked to detect the tooth pitch of the disc gear; when disc gears with large-interval teeth appear, the reciprocating motion state of the gear detection head is locked, detection cannot be continued, and the disc gears are classified to unqualified product positions subsequently, so that the quality detection effect of the disc gears is improved.

The present application relates to a transfer mechanism / device (40) for transferring one or more objects (O) through a transfer port (R), comprising a support base (41), a shuttle (42) having a mount (43) for a holding means (47) for one or more objects (O) or a holding means for one or more objects, and a container (44) that houses the support base (41) and the shuttle (42) and is configured to house one or more objects (O), the container (44) having at least one opening (45) at an end in an axial direction (X) of the container (44). The shuttle (42) is mounted on the support base (41) for translational movement in the axial direction (X) and is configured to thereby move the holding means (47) carrying one or more objects (O), and the container (44) is coupled to the transfer port (R) and is configured to allow the translational movement of the shuttle (42) in the axial direction (X) to bring the one or more objects (O) into or remove them from the interior of the container (44) through at least one opening (45).

The invention discloses a campus blind area bullying audio early warning device and an intervention method, relates to the field of video monitoring processing equipment, and solves the problem that the collection efficiency and the subsequent disposal efficiency are affected due to the fact that the video and audio collection positions are fixed when an existing campus bullying early warning device is used. Comprising a device shell, a camera, an audio collector, a guide mechanism and a transmission mechanism, the guide mechanism comprises a straight guide rail, a first bent guide rail, a second bent guide rail and a driving part, and the transmission mechanism comprises a first conductive plate and a second conductive plate; the straight guide rail, the first bent guide rail and the second bent guide rail are connected and combined into a long rail to be arranged at the vertex angle position above the campus wall, the device shell is controlled by the driving piece to move along the long rail, the positions of the camera and the audio collector are adjusted, the collecting flexibility and stability are improved, bullying events of the campus blind area are reduced, and the safety of the campus is improved. Circuit communication between the long track and the device shell is completed through the transmission mechanism, and stable signal transmission operation is achieved.

The utility model belongs to the field of RFID (radio frequency identification) scanning equipment, particularly relates to a rocking handle type RFID scanning equipment shielding door, and aims to solve the problems that the existing metal door shielding can cause metal fatigue deformation after being used for a period of time, and misreading is caused by radio frequency signal leakage due to gaps of a metal door, so that the long-time use requirement of an enterprise cannot be met; in order to solve the problems that the equipment cannot be used due to faults of electronic elements, motors and the like, the equipment price is high due to high relative manufacturing cost, and the requirement of large-batch use of enterprises cannot be met, the following scheme is provided: the RFID scanning equipment comprises an RFID scanning equipment box body and electromagnetic shielding cloth, a first mounting frame and a second mounting frame are fixed above an entrance and exit of the RFID scanning equipment box body through bolts, large-stroke folding and unfolding actions of electromagnetic shielding cloth can be carried out through a transmission mechanism, and the operation time and manpower consumption in the period are reduced; the counter weight mechanism achieves gravity neutralization in the direction opposite to the movement direction of the electromagnetic shielding cloth, and manual shifting of the operation rod is more labor-saving and more portable.

The utility model discloses an ultrasonic flowmeter which comprises a measuring pipe, connecting pipes are arranged at the left end and the right end of the outer side of the measuring pipe in a penetrating mode, mounting covers are mounted at the upper ends of the connecting pipes, plug-in sensors are arranged on the top walls of the mounting covers, and the ultrasonic flowmeter further comprises a self-plugging mechanism. The self-plugging mechanism comprises annular seats, telescopic columns, springs and plugging seats, the annular seats are arranged at the lower ends of the interiors of the connecting pipes, the upper sides of the annular seats are slidably connected with the two symmetrically-distributed plugging seats, and the lower ends of the plug-in sensors penetrate through center holes of the adjacent annular seats and are located in the measuring pipe. When the sensor part of the ultrasonic flowmeter is disassembled and cleaned through the transmission element, the pipeline at the sensor mounting part can be automatically closed without closing a measuring pipeline valve, so that the sensor of the ultrasonic flowmeter is cleaned under the condition of ensuring the normal use of the measuring pipeline, and the ultrasonic flowmeter is convenient to use.

The invention relates to the field of digital audio equipment, provides a multi-clock-source low-jitter burr-free switching audio clock management device, and aims to solve the problems that multi-clock switching generates shock-wave lock falling and forced resampling loses tone quality. The device comprises a multi-channel clock source module, a clock selection and gating module and an audio processing unit. The clock selection and gating module comprises a burr-free multiplexer and an interlocking logic unit, and ensures that only one path of clock is enabled and output at any moment; the device physically monitors the audio word clock frequency through the independent external microcontroller, and outputs a hardware trigger signal, thereby realizing clock source autonomous interlocking switching without a main control chip, and controlling the audio processing unit to realize bypass straight-through transmission. The method is suitable for high-fidelity audio equipment such as a Bluetooth receiver and the like.

The utility model belongs to the field of cleaning machines, and particularly relates to a deep groove ball bearing cleaning machine which comprises an outer shell, a plurality of supporting seats are installed on the inner wall of the bottom of the outer shell, a same cleaning box is installed at the tops of the supporting seats, an ultrasonic generator is installed at the bottom of the cleaning box, and a transverse plate is fixedly installed at the top of the outer shell. A vertical rod is installed at the bottom of the transverse plate, a connecting plate is fixedly installed at the bottom end of the vertical rod, and two bearing placing rods are fixedly installed at the top of the connecting plate. The cleaning device is reasonable in design, the positioning protruding block is pushed out through the fixing spring to support the bearing arranged on the bearing placing rod in a sleeved mode so as to form a gap, the ultrasonic generator generates high-frequency ultrasonic waves to enable cleaning liquid bubbles to be broken to impact stains, and the driving motor drives the brush roller to rotate around the bearing through transmission and conduct autorotation brushing. The cleaning machine integrates multiple cleaning modes, is high in automation degree, can efficiently clean deep groove ball bearings of different specifications, reduces the manual operation intensity, and improves the cleaning efficiency and quality.

The invention discloses a mink body temperature abnormity early warning device based on infrared thermal imaging, and relates to the technical field of mink cultivation, the mink body temperature abnormity early warning device based on infrared thermal imaging comprises a machine body and an infrared thermal imaging lens installed at the front end of the machine body, and further comprises an installation assembly, the auxiliary device is arranged on the machine body and used for assisting installation and connection of the machine body; and the warning assembly is arranged between the machine body and the mounting assembly and used for preventing the mink from treading in the mink body temperature monitoring process. In the breeding process of the marten, the marten body temperature abnormity early warning device based on infrared thermal imaging is used for monitoring the body temperature of the marten in real time, when the bred marten stands on the machine body, sound can be generated through transmission and the warning assembly, the standing marten is driven, the marten is prevented from stepping on the early warning device for a long time, and the marten body temperature abnormity early warning device is prevented from being damaged. Therefore, normal use of the early warning device is facilitated.

The utility model discloses an optical filter switching device and photoelectric imaging equipment. The optical filter switching device comprises a base, a driving motor assembly, an intermediate transmission assembly and an optical filter assembly, the driving motor assembly comprises a driving motor and a driving gear; the driving motor is mounted on the base, and the driving gear is connected with the driving motor; the intermediate transmission assembly comprises an intermediate transmission shaft, a transmission shaft bearing and an intermediate transmission gear; the intermediate transmission shaft is mounted on the base through the transmission shaft bearing; the intermediate transmission gear is mounted on the intermediate transmission shaft and meshed with the driving gear; the optical filter assembly comprises an optical filter set auxiliary support, a first optical filter set rotating shaft bearing, a second optical filter set rotating shaft bearing, an optical filter set rotating shaft, an optical filter set gear, an optical filter lens base, an optical filter and a limiting mechanism. The light filter group gear is installed on the light filter group rotating shaft and is engaged with the intermediate transmission gear. The light filter lens base is installed on the light filter group rotating shaft. By arranging the intermediate transmission gear, the driving part and the transmission part can be prevented from occupying the space of the main light path.

The application provides a scheduling method and system, electronic equipment and storage medium, relates to the technical field of task scheduling, and the method comprises the following steps: determining the video task weight according to the frame type, aging factor and service deficiency integral of the to-be-transmitted video frame in the video task; determining the power task weight according to the signal sampling period of the to-be-transmitted power signal, the preset transmission cutoff time and the current time in the power task; if the power task weight is greater than the video task weight, obtaining the fragment transmission time of the to-be-transmitted video frame, and obtaining the allowed waiting time of the to-be-transmitted power signal; if the fragment transmission time is less than or equal to the allowed waiting time, transmitting the to-be-transmitted power signal through DMA; if the fragment transmission time is greater than the allowed waiting time, reducing the fragment size of the to-be-transmitted video frame until the fragment transmission time is less than or equal to the allowed waiting time, and transmitting the to-be-transmitted power signal through DMA. The application improves the resource scheduling efficiency.

The invention discloses a sealing ring lower cover and PTC upper cover assembling machine which comprises a rack, a sealing ring vibration disc, a lower cover vibration disc, a PTC vibration disc, an upper cover vibration disc, a plurality of transmission rotary disc mechanisms, a lower cover assembling mechanism, a PTC assembling mechanism, an upper cover assembling mechanism and a plurality of video detection mechanisms. The sealing ring vibration disc and the lower cover vibration disc are installed at the input end of the machine frame and are in butt joint with the conveying rotary disc mechanism through the conveying groove frame. The lower cover assembling mechanism, the PTC assembling mechanism and the upper cover assembling mechanism are installed on a workbench in the middle of the machine frame from left to right, the lower cover assembling mechanism, the upper cover assembling mechanism and the PTC assembling mechanism are connected through the transmission rotary disc mechanism, and the upper cover assembling mechanism conveys out assembled finished products through the transmission rotary disc mechanism.

The present application provides a kind of industrial dip paint baking integrated equipment for component production.The present application generates sound waves by vibrating through vibration device, sound waves enter baking chamber through transmission channel, to drive all grill and / or paint tray to vibrate simultaneously, grill drives component to vibrate;When component is immersed in industrial paint in paint tray, accelerate industrial paint to penetrate into component;Or / and after component is lifted from industrial paint, excess industrial paint on component flows back to paint tray;Or / and when component is baked, industrial paint is uniformly solidified on component;Or / and eliminate air bubbles in industrial paint.The present application belongs to the technical field of industrial production and processing equipment.

The present application relates to a transfer device (60) for transferring a plurality of objects (O) through a transfer port (R), including a container (61) having an interior space (67) configured to accommodate the plurality of objects (O) to be transferred through the transfer port (R). The container (61) has at least one removal opening (62) at an end of the container (61) in an axial direction (X) and having a dimension that allows at least individual objects (O) to be removed from the container (61), a door (63) configured to selectively close the at least one removal opening (62) to seal the interior space (67) from the external environment, and a piston (64) disposed within the container so as to be movable in a translational motion toward and away from the at least one removal opening (62) in the axial direction (X) to move the objects (O) contained within the container.

An audio signal processor for generating a two-channel audio signal, comprising: an input interface (100) for providing single-channel acoustic data describing an acoustic environment; a two-channel combiner (200) for synthesizing two-channel acoustic data from single-channel acoustic data using listener position or rotation; and a sound generator (300) for generating a two-channel audio signal from an audio signal and two-channel acoustic data, wherein the two-channel combiner (200) separates the single-channel acoustic data into at least two parts (210) consisting of a direct sound portion and at least one of an early reflection portion and a late reverberation portion, and generates at least two parts for each portion to generate two-channel acoustic data Audio signal processor comprising two physically separated devices (901, 902), wherein the first of the two physically separated devices (901) is configured to process at least one of the direct sound portion and the early reflection portion (220, 230), and the second of the two physically separated devices (903) is configured to process at least one of the early reflection portion and the late reverberation portion (230, 240), and the first device (901) and the second device (902) are connected via a transmission interface (918, 925) and have separate power supplies (917, 924).

The invention provides a scheduling method and system, electronic equipment and a storage medium, and relates to the technical field of task scheduling, and the method comprises the steps: determining a video task weight according to a frame type, an age factor and a service insufficiency integral of a to-be-transmitted video frame in a video task; determining an electric power task weight according to the signal sampling period of the to-be-transmitted electric power signal, a preset transmission cut-off moment and a current moment in the electric power task; if the power task weight is greater than the video task weight, acquiring fragment transmission time of the to-be-transmitted video frame, and acquiring allowed waiting time of the to-be-transmitted power signal; if the fragment transmission time is less than or equal to the allowed waiting time, transmitting the to-be-transmitted power signal through DMA; and if the fragment transmission time is greater than the allowed waiting time, reducing the fragment size of the to-be-transmitted video frame until the fragment transmission time is less than or equal to the allowed waiting time, and transmitting the to-be-transmitted power signal through DMA. The resource scheduling efficiency is improved.

The utility model relates to the related technical field of ultrasonic camera shooting, in particular to a stirring and spraying device of a magnetic particle flaw detector, which comprises a bottom plate, a stirring device is arranged in a liquid storage tank, and a spraying device is arranged on one side of the liquid storage tank. According to the stirring and spraying device of the magnetic powder flaw detector, when the spraying device is started to work, an operator firstly mixes magnetic powder and a dispersing agent according to a proportion and pours the mixture into the liquid storage tank, the stirring device is started to enable the magnetic powder to suspend uniformly, then an external control system starts the self-priming pump, and magnetic powder suspension liquid is conveyed to the spraying pipe through the liquid outlet pipe, the first conveying pipe and the second conveying pipe in sequence; if the spraying height needs to be adjusted to adapt to different workpiece sizes, a second conveying pipe and a telescopic spring are pulled to enable a positioning rod to be disengaged, reset and locked in height, then a control system starts a second motor, a spraying pipe and a spraying head are driven to rotate through transmission of a transmission shaft and a gear, the spraying head sprays mist, and by means of multi-angle rotation and height adjustment, the spraying height can be adjusted. The magnetic powder can uniformly cover the surfaces of various workpieces, so that accurate flaw detection is facilitated.