953results about How to "Implement detection" patented technology

A method for determining parameter of atmospheric environment includes using laser radar determining system to receive backward scattering light of atmosphere, splitting received light to be various lights required by laser radar, carrying out analysis and treatment of data as per set program after photoelectric detection for realizing measurement on atmospheric environmental parameters such as temperature, steam density, airosol extinction coefficient, scattering coefficient, airosol optical thickness, visibility and depolarization ratio of non-spherical particle backward scattering light.

The invention discloses a graphene terahertz wave detector. The graphene terahertz wave detector comprises a graphene field effect transistor and an antenna which can be effectively coupled to terahertz waves. The antenna is in integrated arrangement with the graphene field effect transistor yet is completely independent from the source electrode and the drain electrode of the graphene field effect transistor. According to the invention, through combination between a top grid and a back grid, the transport property of a graphene two-dimensional electron gas is effectively regulated and controlled, and accordingly, the terahertz waves are detected. The two sides of the top grid of the graphene field effect transistor are integrated with a plane antenna which is independent from the source electrode and the drain electrode and can be highly efficiently coupled to the terahertz waves, such that terahertz wave signals are coupled to a grid electrode in the form of capacitance, and the response of the graphene detector to terahertz radiation can be effectively enhanced. The detector can generate photoelectric currents or open-circuit voltages under radiation of the terahertz waves so as to realize room-temperature, high-speed, high-efficiency, high-sensitivity and low-noise detection.

The invention discloses a novel Fabry-Perot interference MEMS (Micro Electro Mechanical System) sound wave sensor, which comprises a collimator, an SOI (Silicon on Insulator) wafer and a bushing, wherein the bushing is arranged below the SOI wafer and is used for supporting the SOI wafer and fixing the collimator; the SOI wafer is provided with a sound-sensitive film; the central axis of the bushing is coincided with the central normal of a circular silicon film on the SOI wafer; the end face of the optical fiber collimator inserted into the bushing is 100-300 microns away from the sound-sensitive film. According to the novel Fabry-Perot interference MEMS sound wave sensor, the end face of the optical fiber collimator provided with a tail fiber and the inner surface of a silicon micro film construct two parallel surfaces of a Fabry-Perot interferometer, and the film is deformed when pressure generated by external sound waves is applied to the film, so that the cavity length of an Fabry-Perot interference cavity is changed. The detection of sound wave signals is realized by modulating the length variation of the F-P cavity, so that a micro microphone with high interference resistance and high sensitivity is provided for use in an environment with strong electromagnetic interference.

The present invention is one kind of micro robot and its in vitro guiding system. Inside the robot, there are permanent magnet, micromotor, RF receiver, miniature battery, tail rotating mechanism, tail rotating rod and high elasticity sealing membrane between the rotating rod and the robot body. The in vitro guiding and controlling system includes an imaging subsystem for scanning the detected area, a computerized control subsystem for receiving the original image data and performing image reconstitution, a magnetically locating subsystem for locating the permanent magnet inside the robot and feeding the original location data to the computerized control subsystem, and a magnetically guiding subsystem for receiving the guide controlling information from the computerized control subsystem and performing the guide control on the micro robot.

The invention discloses a tunnel construction large-scale integrated geophysics advanced detection model test device, which comprises tunnel surrounding rock, a main tunnel model, a model test case, a water-containing geological structure device, a numerical control automation construction device and a main control chamber. The model test device is a large-scale integral geophysics advanced detection model test device meeting the detection of a seismic wave method, an electromagnetic method and a direct current power method, the geophysics advanced detection model test device can be utilized for studying the geophysics response characteristics of the water-containing geological structure device in front of a tunnel face, in addition, various geophysics advanced detection forward and inversion methods of the water-containing geological structure device are verified, the relationship between some geophysics detection method results and the water inflow is studied, and the test foundation is laid for the water inflow prediction and the advanced prediction of the water-containing geological construction device in actual engineering.

The invention relates to a burning and explosion accident sensing and risk predicting early-warning intelligent fire fighting helmet implementing method. A fire fighting helmet, a long-distance combustible gas detector, a thermal imaging camera module, a head-mounted near-eye display module, a positioning instrument, a data communication and transmission module, an embedded core board, an earphone, a base station, and a fire fighting command centre are involved. According to the burning and explosion accident sensing and risk predicting early-warning intelligent fire fighting helmet implementing method, the real-time position of a fireman in a building can be displayed for the fireman by combining a fireman positioning technology, a building information model and real scene thermal image information, and projecting and displaying information through the head-mounted near-eye display module, so that the environment burning and explosion dangerousness and risk thereof are predicted in real time. When the fireman enters an unknown environmental place, a potential fire disaster explosion accident risk can be effectively predicted quickly; quick sensing and information communication ofthe fireman to a fire disaster accident scene can be realized through an advanced video and thermal imaging technology and an indoor positioning and communication transmission technology, so that thefire fighting rescuing scientific level and the capacity of the fireman are improved.

The invention relates to the field of radio signal reconnaissance and discloses a radio signal identification method based on a deep learning model and a realization system thereof. The radio signal identification method realizes signal feature extraction and real-time detection through a machine learning mode, that is, training and classification recognition are carried out on a signal time-frequency graph obtained through STFT by utilizing the deep learning model, so that more signal features can be utilized to be greatest degree, and detection of short burst and weak signals is realized; and meanwhile, the signal detection problem is converted into the image classification identification problem, and signal classification detection is realized through a deep learning method, so that special designs for special signals are not needed, and the method has universality, and facilitates actual promotion and application.

The invention discloses a self-propelled drilling robot which comprises a drilling system, a power system and a control system, wherein the drilling system is used for realizing cutting and conveying of soil; the power system is used for providing the motion capability; the control system is used for controlling the drilling system and the power system; the power system is connected with the drilling system through a transmission; and the control system is in communication connection with the power system and the drilling system. Under the drive of a motor, the robot can realize moving forwards and steering by being pushed by supporting feet. Moreover, the robot is provided with a detection device, a gyroscope and a control circuit board. The application of a combined cable to transmission of a power source and information is beneficial for implementing remote real-time monitoring on the robot by personnel above the ground. The robot has simple mechanism and compact structure, is provided with a drill bit and a dumping device, is beneficial for moving in a self-propelled mode, can successfully drill into the ground, can freely move and steer in the soil, and is suitable for exploration of underground mineral resources, geological exploration, earthquake and mining disaster rescue and the like.

The invention belongs to the technical field of biomedical engineering, and relates to an integration imaging system used for early stage cervical carcinoma detection and integrating fluorescent mesoscope imaging and optical coherence tomography (OCT). The integration imaging system comprises a fluorescent mesoscope imaging system and a spectrum OCT system. The fluorescent mesoscope imaging system comprises a laser light source, a polarizer, a polarized light spectroscope, a first dichroscope, a second dichroscope, an X-Y scanning galvanometer, an objective lens, a fluorescent detection part, a diffused light detection part and a computer, wherein the X-Y scanning galvanometer and the objective lens are shared by the spectrum OCT system. The spectrum OCT system comprises a low-coherent light source, a fiber polarization splitter, a focusing lens, the X-Y scanning galvanometer, the objective lens and a spectrograph. Ultraviolet light beams generated by the laser light source pass through the polarizer, the polarized light spectroscope and the first dichroscope and then are reflected through the second dichroscope, and samples generated by the low-coherent light source are collimated through the focusing lens and are combined with the ultraviolet light beams. The system improves diagnostic specificity through mutual evidence of organization function information and histomorphology information.

The invention provides a detection system for detecting targets around a vehicle and application of the detection system. The detection system includes a vehicle front forward direction sensor (1), a vehicle roof forward direction sensor (2), a right front sensor (3), a left front sensor (4), a right rear sensor (5), a left rear sensor (6), a rear sensor (7), a left side sensor (8), a right side sensor (9) and target selection modules (10), wherein the target selection modules (10) include a forward direction target selection module (11) and a side direction and backward direction target selection module (12), wherein the forward direction target selection module is configured to select targets at least four positions in front of the vehicle as vehicle front side tracking targets based on received target motion information, and the side direction and backward direction target selection module is configured to select targets at the side direction and backward direction of the vehicle as vehicle side direction and backward direction tracking targets according to received target motion information.

The invention provides a greenhouse information automatic monitoring method based on a suspension-type slide rail platform. The method realizes online patrol monitoring of greenhouse crop comprehensive information of image and infrared temperature characteristics of plant nutrition, water, diseases and diseases and pests as well as plant crown breadth, plant height and fruit growth characteristicsand the like through multi-sensor information fusion by adopting a multi-sensor system, utilizing a binocular vision multifunctional camera and combining with a laser ranging sensor and an infrared temperature sensor. By mounting the multi-sensor system on the suspension-type slide platform and combining an elevating system and an electric control rotation pan-tilt, not only accurate positioningand stationary point detection can be realized in the detection heading direction, but also multi-sensor information patrol detection at different detection distance, different pitching view fields and different detection angles is realized; and by adjusting the detection range and pan-tilt azimuth angle, the method not only can detect big plants, such as tomatoes and cucumbers, but also can meetdetection requirements of lettuce and medium and small plants in different growth periods.

The invention provides a terahertz photoelectric detector. The terahertz photoelectric detector at least comprises a substrate with the surface covered with a medium layer, single-layer graphene formed on the surface of the medium layer, first metal electrodes arranged at the two ends of the single-layer graphene and a second metal electrode formed on the back face of the substrate. A current source for measuring the voltage change is arranged between the first metal electrodes, and a voltage source for providing the bias voltage is arranged between the second metal electrode and the first metal electrode at one end of the single-layer graphene. The photoconductive characteristic peak position of the single-layer graphene is modulated by adjusting the bias voltage, and therefore the terahertz frequency is detected.

The invention discloses a terahertz room temperature detector with a high-absorbability structure and a manufacturing method of the terahertz room temperature detector. The terahertz room temperature detector is used for detecting terahertz wave bands. The top layer of the detector is a metal pattern with a sub-wavelength structure, and as an electronic resonator, the metal pattern is used for absorbing terahertz waves with specific frequency; the second layer of the detector is a composite-film microbridge, wherein the bridge surface and a cavity of the microbridge serve as a dielectric layer; the bottom layer of the detector is a thick metal layer plane, wherein the main function of the thick metal layer plane plays is reducing transmission. The metal pattern on the topmost layer is a cross resonator with a square cross structure. The structure has an obvious absorption peak due to high resonance, and the resonance is not sensitive to the polarization of the incident terahertz waves due to the rotation symmetry of the structure. The terahertz room temperature detector with the high-absorbability structure has the characteristics of high absorbability and high sensitivity and further has the advantages of integration easiness, array forms, operation under room temperatures, real-time detection, small size and the like.

The invention discloses a pile bottom cave sonar detection device and method. The signal output end of a three-dimensional electronic compass it connected with the compass signal input end of a single-chip microcomputer. The signal input end of a sonar stress wave driving module is connected with the signal output end of the single-chip microcomputer. The stress wave driving signal output end of the sonar stress wave driving module is connected with a sonar stress wave transmitter. A sonar stress wave receiving sensor is connected with the sonar signal input end of the single-chip microcomputer through a sonar stress wave signal processing module. The communication end of the single-chip microcomputer is connected with an on-site host through a communication cable. A sonar detection probe is perpendicular to the bottom of a pile. The pile bottom cave sonar detection device and method, which are provided by the invention, can carry out detailed karst cave or weak rock detection on an area below the pile bottom, and can accurately determine whether a karst cave or weak rock is in a pile bottom detection range, wherein the karst cave or the weak rock influences the bearing capacity of the pile bottom.

The invention discloses a single pulse wide angle electric scanning reflective array antenna comprising a reconfigurable reflective array surface (1), a polarization grid (2), a bias voltage circuit (3), a wave control machine (4), a control processor (5) and a feed source subsystem (6). The size of the caliber of the polarization grid (2) is equal to that of the caliber of the reconfigurable reflective array surface (1), and the polarization grid (2) is positioned above the reconfigurable reflective array surface (1). A radiation aperture surface of a feed source (61) is parallel and level to the reconfigurable reflective array surface (1) and is positioned at the center of the reflective array surface. The single pulse wide angle electric scanning reflective array antenna adopts a spatial feed mode, that is to say, the feed source irradiates the polarization grid and feeds the array surface after reflection. A polarization grid structure is applied to a reconfigurable reflective array antenna, and the feed source, the polarization grid and the reflective array surface form a double reflective structure, therefore, the performance of an antenna structure is excellent, the antenna structure can facilitate the installation of an antenna port and the connection of the antenna port and a radar system, and the antenna is compact in structure with a low section.

An infrared thermal imaging type laser gas leak detection method and apparatus relates to the optoelectronic gas detection technology in the information technology field. The apparatus is composed of an infrared thermal imaging module, a laser gas concentration detection module, an image display module, a key circuit board, a power module, an alarm module, a laser reflection plate and a central data storage unit. Further provided is a field leak point concentration and thermal imaging data collection method applied with the system. The infrared thermal imaging type laser gas leak detection method and apparatus can obtain field monitor concentration and leak point thermal imaging so as to realize the synchronous field environment gas concentration and thermal imaging data collection.

The present invention discloses a Rayleigh Doppler anemometry laser radar based on wide spectrum gated coherent detection. A band pass filter is used to filter an aerosol mie scattering signal in echo signal current, and a preamplifier is used to amplify a molecular Rayleigh scattering signal. An adjustable band pass filter is used to carry out scan filtering on the amplified Rayleigh signal in a range, and an electric scanning frequency discriminator structure is realized. According to the Rayleigh Doppler anemometry laser radar, the advantages of an amplification effect of a weak signal and a high detection complexity are used in the coherent detection, and the advantage of a small data processing calculation quantity in using a frequency discriminator to discriminate an echo signal in direction detection is used. A problem that a traditional coherent anemometry laser radar can not detect a molecular wide spectrum Rayleigh signal is solved, and the application of a coherent Doppler anemometry laser radar in temperature measurement and high altitude sounding is realized.

The invention provides a polarization-maintaining flat optical fiber coupling ball microscale sensor based on polarization state detection and belongs to the technology of manufacturing and measurement of precise instruments. The polarization-maintaining flat optical fiber coupling ball microscale sensor comprises a laser, a semi-transparent semi-reflective prism, a quarter lambda wave plate, a probe, a polarization state detection device A, a polarization state detection device B and a computer, wherein the probe is composed of a flat package layer polarization-maintaining optical fiber and a coupling ball, and the laser, the semi-transparent semi-reflective prism, the quarter lambda wave plate and the probe are arranged in sequence. Emergent light of the laser is reflected and transmitted by the semi-transparent semi-reflective prism, and reflected light enters the polarization state detection device A; transmission light enters the probe, reverse transmission of a transmission light beam is achieved after the transmission light beam passes through the coupling ball, the transmission light exits from the probe, and emergent light passes through the quarter lambda wave plate, is reflected by the semi-transparent semi-reflective prism again and then enters the polarization state detection device B. When the difference value between the polarization state detected by the polarization state detection device B and the polarization state detected by the polarization state detection device A is changed, it can be determined that the probe is in contact with a detected hole. The polarization-maintaining flat optical fiber coupling ball microscale sensor is high in precision and high in speed.

The invention discloses an early fire smoke detecting method with interference particle recognition capability. A transmitter and two receivers are arranged in a detector, the transmitter can emit twodifferent wavelengths of light, and the two receivers are used to collect two kinds of scattered light power at different angles; the scattered light power at two different angles under certain wavelength conditions can be simultaneously measured, thereby obtaining the asymmetry ratio by calculating the ratio. By letting the transmitter alternately emit beams of different wavelengths in the pulseform, the forward-backscattered optical power signals at different wavelengths can be obtained, as well as their changes over time. According to the method, the asymmetry ratio of different wavelength conditions is utilized to distinguish fire smoke particles from common interference particles; combined with the asymmetry ratio and its fluctuation characteristics, the detection of early fire smoke particles can be achieved; a signal strength threshold is not used to determine whether an alarm should be mode. Therefore, the detection method can respond to the fire black and white smoke particles in a balanced manner.

The invention discloses a non-contact static detection device, which comprises a static sensor, an electronic switch and an electric signal processing unit, wherein the static sensor comprises a sensing electrode and a coupling electrode; the sensing electrode is a metal static signal receiving surface; the coupling electrode is a metal electrode; the sensing electrode and the coupling electrode construct a capacitor of fixed capacitance; the sensing electrode is electrically connected with the electronic switch; and the electric signal processing unit is used for grounding or suspending the sensing electrode alternatively by controlling the electronic switch, and is also used for performing subsequent processing on an alternating signal acquired from the coupling electrode to convert the processed alternating signal into an electric field value. The non-contact static detection device has the characteristics of no mechanical part, high coupling capacitance variation quantity, high sensitivity, flexible sensor design and easiness in realizing; and by selecting the static sensor, static electricity or weak static electricity in tiny regions can be measured in real time and absolutely.

A conjugated bi-pass lighting confocal microscopic device of a fluorescent reflecting mirror belongs to an optical micro measurement technology. A collimation beam expander and a beam splitter are sequentially arranged on a direct light path of a laser, a focusing object lens and a three-dimensional micromovement object stage are arranged on the reflected light path of the light splitter, a narrow-band filter and a converging object lens are arranged on the transmission light path of the beam splitter, transmission optical fibers transmit the converging light of the converging object lens to a photodetector, an ellipsoidal reflector is also arranged on the reflected light path of the beam splitter, the perifocus of the ellipsoidal reflector is positioned a sample surface which is put on the three-dimensional micromovement object stage, and the fluorescent reflecting mirror is arranged at the apofocus of the ellipsoidal reflector. The microscopic device prevents the interference which is generated by the mixed light-wave superposing which is caused by primary lighting and secondary lighting of bi-pass lighting, and has high signal-to-noise ratio and axial resolution.

The invention discloses an independent photoelectric smoke detection alarm which comprises an alarm base, an alarm upper cover and a circuit board. The alarm upper cover covers the alarm base to form a photoelectric darkroom, and only smoke and less light are allowed to enter the photoelectric darkroom. A space is surrounded by a lower recessed cavity in the alarm base and an upper recessed cavity in the alarm upper cover to form the photoelectric darkroom. The circuit board is arranged in the lower recessed cavity. A signal processing module, an infrared transceiver module and a wireless communication module are integrated on the circuit board. The infrared transceiver module comprises an infrared light emitting diode and an infrared receiving diode. A voice alarm module and a display module are built in the alarm upper cover. A test button is arranged on the alarm upper cover. A power supply module is arranged in the alarm base. The independent photoelectric smoke detection alarm provided by the invention has the advantages of strong anti-interference ability, sensitive detection, simple structure, reasonable design, accurate detection and long service life. A 3-volt lithium manganese battery with the service life of 10 years is built in the independent photoelectric smoke detection alarm.

The invention discloses a networking navigation radar target tracking system based on data fusion. The system comprises at least one radar front end, at least one radar terminal and an Ethernet. The radar front end and the radar terminal are in bidirectional data transmission through the Ethernet. The radar front end comprises an antenna, a transceiver, a data acquisition module, a signal preprocessor module and a control command processing module. The radar terminal comprises a display unit, a signal processing unit and a control unit. The transceiver generates radio-frequency pulses which are radiated to the space through an antenna. The system belongs to a trace point serial processing centralized data fusion structure, has the features of high fusion precision and small system time delay, and meanwhile, has the advantages of eliminating detection blind areas, improving detection probability and improving tracking performance. After the terminal carries out data fusion and comprehensive optimization processing on the data of the plurality of front ends, the problem of blind area of the single radar due to antenna erection location can be effectively solved, marine target detection and tracking accuracy performance is improved, and navigation safety is guaranteed.

The invention relates to a detection device and especially relates to an in-situ detection device for occurrence of hydrates in deposits. The CT in-situ detection device for microcosmic occurrence of hydrates in deposits comprises a pressure control system, a semiconductor temperature control system, an autoclave and an X-CT scanning system. The pressure control system is communicated with the autoclave. The semiconductor temperature control system is arranged at the bottom of the autoclave. The X-CT scanning system is arranged at two sides of the autoclave. The device achieves real-time detection of distribution of deposit particles, water, hydrates and free gas during hydrate formation / decomposition process.

The invention relaters to the weakly light signal detection field, especially to a kind of high-effect infrared single photon detection method including the infrared single photon signal source, the pumping source, the nonlinear crystal, the single photon signal channel and pumping light channel. It is characterized in that the pumping source is composed by the optical fiber laser; the infrared single photon signal inputted by the optical fiber transmission and the pumping light inputted by the optical fiber laser are coupled by the optical fiber polarized controller separately, which are inputted into the wavelength division multiplexer. The output pumping and signal light are outputted by one optical fiber collimator, which can save the complex system accesspries and adjusting process. It has the compact structure, good portable. The laser power is outputted stably, also it has good mode and easy for nonlinear coupling, so it can reach the good room mode matching of two beams in nonlinear crystal. The whole detector can be made by all optical fiber and has low energy cost. It is also convenience to connect other optical fiber devices and reaches the alter use of many systems.

The invention discloses a dual frequency band dual polarization spaceborne cloud-rain measurement radar system which is mainly composed of an antenna subsystem, a radio frequency subsystem, a digitalsubsystem, a monitoring subsystem and a power supply subsystem. The antenna subsystem adopts a parabolic reflector / microstrip reflective array antenna feeder system, and comprises a parabolic reflector / microstrip reflective array antenna, a Ka frequency band active phased array feed source, a W frequency band beam waveguide feed system and a Ka / W frequency band shared parabolic reflector / microstrip reflective array antenna. The radio frequency subsystem is connected with the Ka frequency band active phased array feed source, the W frequency band beam waveguide feed system and the digital subsystem. The digital subsystem is connected with a terminal. The system provided by the invention has the advantages that the three-dimensional vertical structure information of clouds and precipitationin the field of view can be quantitatively acquired; and the acquired global cloud-rain three-dimensional structure data can be applied to three-dimensional high-precision inversion of atmospheric clouds and precipitation, can be applied to global extreme weather monitoring and forecasting, and can be applied to atmospheric science and numerical simulation studies.

The invention discloses a radar detection system and method for low-altitude multi-target classification and identification. The radar detection system for low-altitude multi-target classification andidentification includes a waveform generator, an antenna unit, a reception unit and a signal processing unit, wherein the waveform generator is used for generating detection wave beams in which the energy is concentrated below the specified threshold according to the low-altitude area to be detected; the antenna unit is used for transmitting the detection wave beams output from the waveform generator and receiving a target echo signal; the reception unit is used for performing down-conversion on the target echo signal received by the antenna unit to become an intermediate frequency signal andoutput the intermediate frequency signal; and the signal processing unit is used for acquiring the positional information of the target according to the intermediate frequency signal output from thereception unit and outputting the identified target type. The radar detection method for low-altitude multi-target classification and identification is to realize low-altitude multi-target classification and identification. The radar detection system and method low-altitude multi-target classification and identification can realize real-time detection and classification and identification of low-altitude multiple targets, and have the advantages of high identification efficiency, high accuracy and high flexibility.

The invention provides a method for detecting obstacle movement direction based on a laser radar. The method is used for solving the problem that in the prior art, algorithm is complex and a pluralityof data needs to be processed in obstacle movement direction recognition. The method comprises the following steps of S1, obtaining a preset scanning time interval, point cloud data information corresponding to an obstacle in a preset scanning range, and distance information of the point cloud corresponding to the obstacle relative to the laser radar through the laser radar; S2, acquiring outlineinformation corresponding to the current obstacle; S3, judging whether the obstacle outline information obtained at two adjacent preset scanning time interval points coincide or not according to a preset fitting comparison algorithm; and S4, if yes, judging the movement direction of the obstacle relative to the laser radar by comparing the distance between the obstacle and the laser radar at twoadjacent preset scanning time interval points. By the method, a small amount of data needs to be processed to judge the movement direction of the obstacle, so that the purpose of active obstacle avoidance is achieved.

The invention discloses a phase conjugate reflection bi-pass lighting confocal microscopic device, belonging to an optics measuring microtechnique. A collimation beam expander and a spectroscope are configured on a laser direct light path in sequence; a focusing objective lens and a three-dimensional micrometric displacement objective table are configured on a spectroscope reflecting light path; a collecting objective lens is configured on a spectroscope transmission light path; a collecting objective lens converging light is conducted to a photoelectric detector through conduction optical fibers; an ellipsoid reflecting lens is also configured on the spectroscope reflecting light path; a near focus of the ellipsoid reflecting lens is located on a surface of a sample put on the three-dimensional micrometric displacement objective table; and a phase conjugate reflecting lens is configured at a remote focus of the ellipsoid reflecting lens. According to the device, bi-pass lighting to a large curvature convex surface is carried out by adopting a characteristic that a reflection ray as a phase conjugate light wave of an incidence light of the phase conjugate reflecting lens can go back along an original way in combination with a characteristic that the ellipsoid reflecting lens is provided with a pair of isoplanatic image formation conjugate focuses, so that the device has a measurement ability of the large curvature convex surface and a characteristic of a high axial resolution force.

The invention discloses an underwater fixed-depth and fixed-height towing device which is provided with an underwater carrier, wherein the underwater carrier is connected with a cable winding / unwinding device by a cable, a probe of a depth measuring transducer is arranged on the underwater carrier, an output signal of the probe of the depth measuring transducer is connected with a display and control terminal by a cable, and a control signal output by the display and control terminal is used for controlling the cable winding / unwinding device. The underwater fixed-depth and fixed-height towing device does not need power and is low in cost, the probe of the depth measuring transducer can acquire depth from the towed carrier to the water surface or height from the towed carried to the water bottom in real time, the display and control terminal can control the cable winding / unwinding device according to measured depth from the towed carrier to the water surface or the height from the towed carrier to the water bottom, and the depth or the height of the towed carrier can be compensated and regulated in real time through the winding / unwinding for the cables and control on a navigational speed of the cable winding / unwinding device, so that the depth of immersion and underwater height can be controlled, so as to realize accurate measurement and detection in underwater fixed-depth and fixed-height towing.