Showing papers on "Vertical plane published in 2020"
TL;DR: In this paper, a dual-polarized end-fire phased array for 5G handset devices at 28 GHz was proposed, which achieved a −10 dB frequency bandwidth of 5.3% and a −6 dB bandwidth of 25% overlapping between the vertical and horizontal polarization.
Abstract: This communication proposes a dual-polarized end-fire phased array for 5G handset devices at 28 GHz. The proposed four-element array has low profile of 1.1 mm, small clearance of 2.7 mm, and symmetric patterns in the vertical plane. The array element is fed by substrate-integrated waveguide (SIW), which works as a waveguide (WG) antenna with vertically polarized radiation pattern. Two transition plates are introduced to improve the impedance matching of the WG antenna. The horizontal polarization is generated by exciting one of the transition plates as an antenna. The other transition plate is modified as a group of triangle strips to minimize its reflection to the horizontal radiation patterns. A −10 dB frequency bandwidth of 5.3% and a −6 dB bandwidth of 25% are achieved, overlapping between the vertical and horizontal polarization. The array scanning angle is from −54° to 44° at 29 GHz for both polarization. Within the scanning range, the end-fire gain varies from 7.48 to 8.14 dBi for the horizontal polarization, whereas from 4.49 to 8.05 dBi for the vertical polarization. Good agreements between simulations and measurements are well achieved and shown in this communication.
71 citations
TL;DR: In this paper, the dynamics of a 3D dusty plasma in a strong magnetic field were investigated. And the ion drag force and dust charge gradient along with the E-field were considered as possible energy sources for driving the edge vortex flow and central region vortex motion, respectively.
Abstract: This paper reports on the dynamics of a 3-dimensional dusty plasma in a strong magnetic field. An electrostatic potential well created by a conducting or non-conducting ring in the rf discharge confines the charged dust particles. In the absence of the magnetic field, dust grains exhibit a thermal motion about their equilibrium position. As the magnetic field crosses a threshold value (B > 0.02 T), the edge particles start to rotate and form a vortex in the vertical plane. At the same time, the central region particles either exhibit thermal motion or E → × B → motion in the horizontal plane. At B > 0.15 T, the central region dust grains start to rotate in the opposite direction resulting in a pair of counter-rotating vortices in the vertical plane. The characteristics of the vortex pair change with increasing the strength of the magnetic field (B ∼ 0.8 T). At B > 0.8 T, the dust grains exhibit very complex motion in the rotating torus. The angular frequency variation of rotating particles indicates a differential or sheared dust rotation in a vortex. The angular frequency increases with increasing the magnetic field from 0.05 T to 0.8 T. The ion drag force and dust charge gradient along with the E-field are considered as possible energy sources for driving the edge vortex flow and central region vortex motion, respectively. The directions of rotation also confirm the different energy sources responsible for the vortex motion.
27 citations
TL;DR: In this article, the added mass and damping coefficients for circular heave plates attached to a column, when oscillating in heave in the presence of oncoming waves are investigated.
Abstract: The research problem discussed in this paper is of relevance to floating offshore wind turbine design, where heave plates are attached to the columns of a semi-submersible in order to improve vertical plane stability and the power output. Because of the shallow draft of these structures, the heave plates are proximal to the water surface. When subject to vertical plane motions the flow around a plate is altered by the presence of the free surface, resulting in changes in added mass and damping forces. In this paper, we present the experimental results for the added mass and damping coefficients for circular heave plates attached to a column, when oscillating in heave in the presence of oncoming waves. The results tend to indicate that applying the hydrodynamic coefficients obtained from still water experiments for a structure moving in waves may only be an approximation. For different relative phases of the wave and the motion, large variations could occur. We define a modified Keulegan—Carpenter (KC) number that depends on the relative amplitude of motion with respect to the wave. With this definition, the added mass and damping values are seen to be closer to the still water trends. However, at lower KC values, the added mass coefficients could differ by 30%, which can affect natural frequency estimates. Thus, caution needs to be exerted in the selection of hydrodynamic coefficients for heave plates oscillating in proximity to the free surface.
13 citations
TL;DR: The kinematics of such 2D modular snake robot is presented in an efficient matrix form and Euler–Lagrange equations are constructed to model the robot and an adaptive controller based on torque feedback with optimized control gain is proposed.
Abstract: This paper introduces the equations of motion of modular 2D snake robots moving in the vertical plane employing Series Elastic Actuators (SEAs). The kinematics of such 2D modular snake robot is presented in an efficient matrix form and Euler–Lagrange equations are constructed to model the robot. Moreover, using a spring-damper contact model, external contact forces, necessary for modeling pedal wave motion (undulation in the vertical plane) are taken into account, which unlike existing methods can be used to model the effect of multiple contact points. Using such a contact model, pedal wave motion of the robot is simulated and the torque signal measured by the elastic element from the simulation and experimentation are used to show the validity of the model. Moreover, pedal wave locomotion of such robot on uneven terrain is also modeled and an adaptive controller based on torque feedback with optimized control gain is proposed. The simulation and experimental results show the efficiency of the proposed controller as the robot successfully climbs over a stair-type obstacle without any prior knowledge about its location with at least 24.8% higher speed compared with non-adaptive motion.
11 citations
TL;DR: This work suggests that male Lucilia control both horizontal and vertical steerings by employing proportional controllers to the error angles, and operates at time delays as small as 10 ms, the fastest steering response observed in any flying animal, so far.
Abstract: Effective visuomotor coordination is a necessary requirement for the survival of many terrestrial, aquatic, and aerial animal species. We studied the kinematics of aerial pursuit in the blowfly Lucilia sericata using an actuated dummy as target for freely flying males. We found that the flies perform target tracking in the horizontal plane and target interception in the vertical plane. Our behavioural data suggest that the flies' trajectory changes are a controlled combination of target heading angle and of the rate of change of the bearing angle. We implemented control laws in kinematic models and found that the contributions of proportional navigation strategy are negligible. We concluded that the difference between horizontal and vertical control relates to the difference in target heading angle the fly keeps constant: 0° in azimuth and 23° in elevation. Our work suggests that male Lucilia control both horizontal and vertical steerings by employing proportional controllers to the error angles. In horizontal plane, this controller operates at time delays as small as 10 ms, the fastest steering response observed in any flying animal, so far.
10 citations
TL;DR: The demonstrated antenna possesses circular polarization and direction based circular polarization diversity at angles against the greatest path-lengths, and the radiating element exhibits omnidirectional radiation characteristics, with good horizontal gain.
Abstract: Circularly-polarized planar antenna with a shaped pattern for airborne applications, is proposed in this letter. The proposed antenna consists of vertically-polarized formation and horizontally-polarized stubs to provide circularly-polarized configuration, which is loaded by a copper curl based top layer to control current distribution for beam shaping and filling of zenith null. The antenna also contains split ring resonators beside partial ground to make it deployable over larger ground planes (metallic bodies) without distorting circular polarization by controlling phase of reflected waves. The power density of presented airborne shaped pattern antenna differs for variant elevation and azimuth angles, to have uniform wireless coverage over the earth’s surface by managing variations of the signal strength because of different path lengths. The demonstrated antenna also possesses circular polarization and direction based circular polarization diversity at angles against the greatest path-lengths. Antenna retains a null-filled pattern in the vertical plane along with having high absolute peak gain (5.5 ± 1 dBi) and adequate peak polarization gain (2 to 4 dBi) through-out the operational bandwidth from 2.82 GHz to 2.89 GHz (Measured reflection coefficient less than −10 dB). Moreover, the radiating element exhibits omnidirectional radiation characteristics, with good horizontal gain (greater than −3.6 dBi).
7 citations
01 Oct 2020-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, the fast orbit feedback (FOFB) system at NSLS-II in 2019 was characterized by measuring the transfer function and the closed-loop gain of the system.
Abstract: This paper discusses improvements made to the fast orbit feedback (FOFB) system at NSLS-II in 2019. We first characterized the system by measuring the transfer function and the closed-loop gain of the system. We also constructed a model to predict the performance, which was based on physical behaviors. After finding and fixing the sources of the latency, we improved the closed-loop gain’s bandwidth from 250 Hz to 400 Hz in the horizontal plane and 250 Hz to 300 Hz in the vertical plane. The orbit beam instability improved by 30% and 10% in the horizontal and vertical planes, respectively.
7 citations
TL;DR: In this article, a method of control for an ordered group of particles that levitate in an ultrasonic field and structures of rectilinear segments is proposed, where four phased arrays of radiators are placed oppositely on lateral faces of a rectangular parallelepiped.
Abstract: A method of control for an ordered group of particles that levitate in an ultrasonic field and structures of rectilinear segments is proposed. An ultrasonic field in air at a frequency of 40 kHz and particles whose dimensions are less than a quarter of a wavelength or thin cylindrical objects with diameters of less than a quarter of a wavelength are considered. The ultrasonic field is formed using four phased arrays of radiators that are placed oppositely on lateral faces of a rectangular parallelepiped. The radiators form a distribution of the standing wave field in the plane, which provides levitation of particles in a rectangular grid in a plane layer. With the use of numerical simulation and experimentally, it has been shown that the obtained distribution is stabilized and the particles remain immobile at local minimums of the Gor’kov potential. Moreover, regulation of the phase difference of opposite radiators provides controlled motion of a group of particles in a horizontal plane and a change in the focusing plane of side radiators provides controlled motion of a group of particles along the vertical plane. It has been shown experimentally that not only small particles but also structures assembled of rectilinear segments whose length is much greater than the wavelength can levitate in this field distribution.
6 citations
TL;DR: In this paper, the ringlock scaffolding joints were tested with a typical testing machine and a grip handle, and the results showed that the rosette provided a temporary connection between the vertical standard and the ledger.
5 citations
01 Feb 2020
TL;DR: In this paper, the authors studied the vibration load on the driver's seat when driving a vehicle under agricultural conditions and found that the standard KamAZ-43255 car seat string system effectively damps vibrations with the frequency of more than 16 Hz, and practically does not damp vibrations below 4 Hz.
Abstract: In order to ensure safe working conditions for drivers, strict requirements are imposed on the smooth running of agricultural vehicles. The purpose of this research was to study the vibration load on the driver’s seat when driving vehicle under agricultural conditions. Studies have revealed that the standard KamAZ-43255 car seat string system effectively damps vibrations with the frequency of more than 16 Hz, and practically does not damp vibrations below 4 Hz. It was determined that: at all speeds, the maximum values of vibration acceleration in the vertical plane are located in the second octave at the frequency of 2.0 Hz; peak values of vibration acceleration of the driver’s seat in the horizontal plane are located in the third octave at frequencies of 3.15 4.1 Hz; maximum mean square accelerations in the vertical plane are 3.76 times higher than the maximum permissible standards; at vehicle speed of V = 20 km/h, the acceleration of the driver’s seat in the vertical plane exceeds the permissible values in 3.9 times, in the horizontal plane it exceeds the permissible values in 2.75 ... 2.79 times. Therefore, on agricultural vehicles, it is necessary to install spring systems that are adaptive to operating conditions.
5 citations
TL;DR: The paper presents the algorithm for the ATGM control using Jacobian, as the matrix of state, calculated at each time instant, using the linear-quadratic regulator (LQR) to provide control capabilities.
Abstract: The paper concerns the issue of optimum control of the strongly non-linear dynamic system, i.e. Anti-Tank Guided Missile (ATGM). The linear-quadratic regulator (LQR) was used to provide control capabilities. In order to use the classic LQR, the dynamics of the object must be presented in the form of a linear-stationary model. This is not possible in the case of the considered missile, mostly due to mass changing in time (intensive consumption of fuel) and varying aerodynamic conditions depending on the Mach number Ma. Thus, we are dealing with a non-stationary system. Moreover, state variables are frequently involved in complex functions, which do not allow one to separate coefficients related to state variables very easily. In order to linearize such a complex system, the paper uses Jacobian, as the matrix of state, calculated at each time instant. The automatic pilot of the ATGM, using the LQR method, determines the signals controlling the angles of flight control surfaces and the thrust vector using continuously calculated Jacobians. The paper presents the algorithm for the ATGM control.
TL;DR: In this paper, the authors used a scanning, stereoscopic PIV system to capture the three components of the velocity field in the whole volume occupied by the fluid, and compared with numerical results obtained through the solution of the conservation equations obtaining an excellent agreement.
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TL;DR: In this paper, the behavior of a billiard trajectory in a homogeneous force field is studied and geometric tools suitable for studying the behaviour of billiard trajectories in homogeneous forces are proposed.
Abstract: We propose geometric tools that are suitable for studying the behavior of a billiard trajectory in a homogeneous force field. Two examples are considered: a vertical plane with an open top and with a parabolic or right angle boundary at the bottom. In either case, we obtain equations that describe the envelope of a trajectory. These equations are in good agreement with those found earlier with the use of other calculation methods. In addition, we present some new geometric properties of trajectories. We show that in the case of a parabolic boundary the sequence of the trajectory impact points can be easily constructed by multiple reflections of a single ellipse.
01 May 2020
TL;DR: In this paper, a supercavitating vehicle can quickly become unstable under the influence of the planing force and external disturbances due to waves and currents due to a wave or a current.
Abstract: The supercavitating vehicle can quickly become unstable under the influence of the planing force and external disturbances due to waves and currents. The planing force demonstrates nonlinear charac...
21 Sep 2020
TL;DR: In this paper, the effect of an accelerating metal plate lens used to increase the signal level in the direction of the remote subscriber of the wireless access system on the frequency spectrum of the received signal, the field structure in the horizontal and vertical plane, and polarization was revealed.
Abstract: The results of experimental studies of the effect of an accelerating metal plate lens used to increase the signal level in the direction of the remote subscriber of the wireless access system on the frequency spectrum of the received signal, the field structure in the horizontal and vertical plane, and polarization are presented. An insignificant (up to 20 kHz) narrowing of the spectrum of the radio signal of the Wi-Fi system using a lens was revealed. The effect of the lens on the field distribution in the azimuthal plane is clarified. The angular parameters of the shading areas are estimated where the reception conditions worsen when the lens is located near the access point. In the vertical plane, the lens significantly narrows the angular sector of the radiation. The measurements were carried out under conditions typical of such systems. A brief description of the measuring complex developed for these studies is given.
TL;DR: In this article, the authors considered the nonlinear reflection of a finite-width plane internal gravity wave incident onto a uniform slope and showed that the amplitude of the second-harmonic wave has a finite behaviour at resonance, increasing linearly from the slope.
Abstract: The nonlinear reflection of a finite-width plane internal gravity wave incident onto a uniform slope is addressed, relying on the inviscid theory of Thorpe (J. Fluid Mech., vol. 178, 1987, pp. 279–302) for pure plane waves. The aim of this theory is to determine the conditions under which the incident and the reflected waves form a resonant triad with the second-harmonic wave resulting from their interaction. Thorpe’s theory leads to an indeterminacy of the second-harmonic wave amplitude at resonance. In waiving this indeterminacy, we show that the latter amplitude has a finite behaviour at resonance, increasing linearly from the slope. We investigate the influence of background rotation and find similar results with a weaker growth rate. We then adapt the theory to the case of an incident plane wave of finite width. In this case, nonlinear interactions are confined to the area where the incident and reflected finite-width waves superpose, implying that the amplitude of the second-harmonic wave is bounded at resonance. We find good agreement with the results of numerical simulations in a vertical plane as long as the dissipated power of the incident and reflected waves remain smaller than the power transferred to the second-harmonic wave. This is the case for small slope angles. As the slope angle increases, the focusing of the reflected wave enhances viscous effects and dissipation eventually dominates over nonlinear transfer. We finally discuss the relevance of laboratory experiments to assess the validity of the theoretical results.
TL;DR: In this paper, the authors solved the numerical problem of elasto-viscoplastic drops colliding in a vertical plane using a Marker-And-Cell method combined with a Front-Tracking interface representation.
Abstract: The collision of drops in a solid substrate is an interesting problem with several practical applications. When the drop is made of a complex fluid the problem presents numerical challenges due to the interaction of the mechanical properties and the free surface approach. In the present work, we solve the numerical problem of elasto-viscoplastic drops colliding in vertical plane. The free surface evolution is handled by a Marker-And-Cell method combined with a Front-Tracking interface representation. Special emphasis is given to the gravitational effects by means of exploring the Froude number. We were able to find a rich variety of outputs that can be classified as sticking, sliding, bouncing, detaching, and slithering.
TL;DR: In this paper, the authors investigate the motion of a massive particle constrained to move along a path consisting of two line segments on a vertical plane under an arbitrary conservative force and find the least-time path.
Abstract: We investigate the motion of a massive particle constrained to move along a path consisting of two line segments on a vertical plane under an arbitrary conservative force. By fixing the starting and end points of the track and varying the vertex horizontally, we find the least-time path. We define the angles of incidence and refraction similar to the refraction of a light ray. It is remarkable that the ratio of the sines of these angles is identical to the ratio of the average speeds on the two partial paths as long as the horizontal component of the conservative force vanishes.
01 Jul 2020
TL;DR: In this article, a robust adaptive control algorithm for the hybrid underwater glider (HUG) is proposed, in which the pitch control is designed using backstepping technique and direct adaptive control.
Abstract: Abstract Hybrid underwater glider (HUG) is an advanced autonomous underwater vehicle with propellers capable of sustainable operations for many months. Under the underwater disturbances and parameter uncertainties, it is difficult that the HUG coordinates with the desired depth in a robust manner. In this study, a robust adaptive control algorithm for the HUG is proposed. In the descend and ascend periods, the pitch control is designed using backstepping technique and direct adaptive control. When the vehicle approaches the target depth, the surge speed control using adaptive control combined with the pitch control is used to keep the vehicle at the desired depth with a constant cruising speed in the presence of the disturbances. The stability of the proposed controller is verified by using the Lyapunov theorem. Finally, the computer simulation using the numerical method is conducted to show the effectiveness of the proposed controller for a hybrid underwater glider system.
14 Oct 2020
TL;DR: The article describes the design of this antenna subsystem, including its protective cover and input connector, which has omnidirectional characteristics in the horizontal plane and is necessary to achieve an even signal coverage around the railway warning device.
Abstract: The article deals with the design of an antenna subsystem for a system which increases the security of railway crossings. Specifically, it is a design of a planar antenna array composed of several planar dipoles. The design procedure of a planar dipole is discussed. The article describes the design of this antenna subsystem, including its protective cover and input connector. The proposed antenna system has omnidirectional characteristics in the horizontal plane. This is necessary to achieve an even signal coverage around the railway warning device. In the vertical plane, the antenna array has a beamwidth of 20 degrees, which allows an increase of system gain. Finally, several samples of the designed antenna subsystems were produced and their parameters were verified by measurements.
TL;DR: The results of psychoacoustic experiments indicate that the current Ambisonics panning method yields a reasonable localization performance and is superior to traditional pair-wise amplitude panning.
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31 Mar 2020
TL;DR: In this article, a motion camera stabilizer consisting of a first angle measuring module and a second angle measurement module is used to measure the inclination angle between the motion camera body and the horizontal plane.
Abstract: The utility model relates to a motion camera stabilizer which comprises a motion camera body, and a first angle measuring module, a second angle measuring module, a control module, a horizontal adjusting motor and a vertical adjusting motor are arranged in the motion camera body. The control module is connected with the first angle measuring module, the second angle measuring module, the horizontal adjusting motor and the vertical adjusting motor. The first angle measuring module is used for measuring the inclination angle between the motion camera body and the horizontal plane; the second angle measurement module is used for measuring an inclination angle between the motion camera body and a vertical plane; the control module is used for controlling the working states of the horizontal adjusting motor and the vertical adjusting motor according to the inclination angles measured by the first angle measuring module and the second angle measuring module. Self-adaptive adjustment of the shooting angle of the motion camera can be effectively achieved, and the motion camera can maintain a stable shooting angle.
Patent•
23 Dec 2020
TL;DR: In this article, a solar tracking portable structure with 2-axis orientation motors (elevation an azimuth) is presented, which integrates light semi-flexible solar panels technology with a particular design whose goal is to achieve the maximum lightness and manageability.
Abstract: The present invention comprises a solar tracking portable structure with 2 axes orientation motors (elevation an azimuth) that integrates light semi-flexible solar panels technology with a particular design whose goal is to achieve the maximum lightness and manageability of the system. The system as a whole is portable and foldable, and the orientation of the motors is controlled by an electronic system. The tracking structure comprises three coupled substructures: a bottom substructure (1) permanently in contact with ground; a mid substructure (2) that rotates with respect to the bottom structure (1) in the horizontal plane (azimuth); and a top structure (3) that rotates with respect to the mid structure (2) in the vertical plane (elevation). The folding of the pieces that comprises the system is organised in 4 layers each of them occupying an area of the same size.
Patent•
22 May 2020
TL;DR: In this paper, a parameter verification method for a special-shaped machined part is presented, and the accuracy problem of the measurement precision after an operating device is installed at the tail end of a mechanical arm is solved.
Abstract: The invention discloses a parameter verification device, system and method for a special-shaped machined part. The device comprises a positioning part which is provided with a bearing body which is arranged in an inclined manner, wherein the bearing body bears a first tracer; and a verification part which is arranged on the bearing body. According to the invention, the parameter verification device is installed on an inclined plane instead of being installed on a vertical plane in the prior art, and the inclined plane of the parameter verification device provided by the invention can be parallel to an optical tracker, so that the optical tracker can be aligned at the tracer on the optical tracker. According to the parameter verification method for the special-shaped machined part, the accuracy problem of the measurement precision after an operating device is installed at the tail end of a mechanical arm is solved, and the stability and reliability of the system precision are guaranteed.
Patent•
11 Feb 2020
TL;DR: In this article, a vehicle-to-vehicle large-scale antenna channel model building method and system is presented, and the method comprises the steps: enabling a road test scatterer to be equivalent to a vertical plane for building a semi-ellipsoid channel model, and respectively calculating the position vector of each antenna unit in an antenna array configured at a transmitting end and a receiving end in a semidefinite coordinate system.
Abstract: The invention provides a vehicle-to-vehicle large-scale antenna channel model building method and system, and the method comprises the steps: enabling a road test scatterer to be equivalent to a vertical plane for building a semi-ellipsoid channel model, and respectively calculating the position vector of each antenna unit in an antenna array configured at a transmitting end and a receiving end ina semi-ellipsoid coordinate system; based on the position vector, calculating to obtain a scattering area generated by an equivalent vertical plane of the road test scatterer; and calculating to obtain a semi-ellipsoid scattering area according to all scattering areas of the semi-ellipsoid channel model and the scattering area generated by the equivalent vertical plane of the drive test scatterer According to the method, a three-dimensional irregular channel model of a large-scale antenna from a vehicle to a vehicle is established, meanwhile, the influence of a large-scale antenna uniform planar array and a road test scatterer is considered, and on the basis of spherical wave front hypothesis, channel modeling that the geometrical relationship between a transmitting end and a receiving end is constrained by different boundaries of a scattering area is given
Patent•
14 Jan 2020
TL;DR: In this paper, an upper bracket, a vertical rod, a horizontal T-shaped frame and a magnetic line pendant are used to detect the perpendicularity of a prefabricated wall.
Abstract: The utility model discloses a perpendicularity detector for a prefabricated wall. The device comprises an upper bracket, a vertical rod, a horizontal T-shaped frame and a magnetic line pendant, the upper bracket comprises a horizontal plate and a vertical plate; the vertical plate is fixed to the right side of the bottom of the horizontal plate and is perpendicular to the horizontal plate. The horizontal plate is provided with an extension part extending to the right side of the vertical plate; the vertical rod is located on the left side of the vertical plate and vertically fixed to the bottom of the upper support, the horizontal T-shaped frame is fixed to the right side of the vertical rod, the right side of the horizontal T-shaped frame and the right side of the vertical plate are located on the same vertical plane, and the magnetic line pendant is arranged on the left side of the top of the upper support. The perpendicularity detector detects the perpendicularity of the prefabricated wall by measuring the distance between the plumb bob of the magnetic line plumb bob and the wall surface during detection, is simple in structure, convenient to install, accurate in positioning andsmall in detection result error, facilitates operation of workers, and improves the field operation efficiency.
01 Jan 2020
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10 Jan 2020
TL;DR: In this paper, a post information safety supervision instrument for public safety post monitoring is presented, which consists of a supervision device used for obtaining monitoring information, and a sliding component used fordriving the adjusting rod to slide to the same vertical plane as the camera in the direction perpendicular to the imaging direction of the camera.
Abstract: The utility model relates to a post information safety supervision instrument for public safety post monitoring. The system comprises a supervision device used for obtaining monitoring information. The base is used for mounting the supervision device on a wall surface or the ground; base plate is arranged on the base, a vertical plate is rotationally connected to the bottom plate in the directionperpendicular to the bottom plate. The vertical plate and the base are in sliding connection in the horizontal direction. Supervision device comprises a camera, camera arranged on bottom plate, an adjusting rod is slidably connected to the bottom plate in the direction perpendicular to the imaging direction of the camera. A telephoto lens is fixed to the adjusting rod, a sliding component used fordriving the adjusting rod to slide to the same vertical plane as the camera in the direction perpendicular to the imaging direction of the camera is arranged on the bottom plate, a rotating mechanismused for rotating the bottom plate in the vertical plane is arranged on the vertical plate, and a displacement mechanism used for sliding the vertical plate in the horizontal plane is arranged on thebase. A user uses the sliding part to control the telephoto lens and the camera to coincide to increase the supervision range, and uses the rotating mechanism to control the bottom plate to rotate toadjust the supervision visual angle.