119results about How to "Continuous acquisition" patented technology

The invention discloses a hydroturbine fault diagnosis method and a hydroturbine fault diagnosis device based on acoustic emission technology. The method applies the acoustic emission technology to the fault diagnosis of a hydroturbine set, obtains acoustic emission signals on a hydroturbine draft tube and guide vanes of a watermill chamber through an acoustic emission sensor, eliminates noise by adopting morphological filtering technology, adopts the pulse repetition rate to analyze the intensity of the periodicity of the acoustic emission signals, combines spectrum analysis and waveform nearness analysis to identify common rub impact, cracks as well as cavitation and cavitation erosion states, and applies wavelet packet technology for the decomposition and reconstruction of the signals to calculate the acoustic intensity of acoustic emission and perform the trend analysis of parameters of the acoustic intensity along with the working condition such as active power, water head and guide vane opening, further to comprehensively know the operation state and performances of a hydroturbine generator set and guide the operation of a hydroturbine.

The invention discloses a spatial large view field, superwide spectral band and multispectral imaging optical system, which comprises a switching reflector, a main optical off-axis three-reflector system, a medium- and short-wave focus-free relaying optical system and a long-wave focus-free relaying optical system, wherein a radiation light beam of an imaging target enters from the switching reflector, and is divided into light rays in three channels, namely a visible multispectral channel, a short-wave / medium-wave channel and a long-wave infrared channel, by color division sheets after passing through the main optical off-axis three-reflector system; the light ray in the visible multispectral channel is reflected by the first color division sheet, and then full-color multispectral imaging is realized through a five-color device; the light rays in the short-wave / medium-wave channel and the long-wave infrared channel are transmitted / reflected by the second color division sheet, respectively pass through the own focus-free relaying optical systems, and then are focused on a focal surface for imaging after being subdivided by filters. The spatial large view field, superwide spectral band and multispectral imaging optical system has the advantages of large view field, large relative aperture, wide spectral range, high subdivision degree, compact structure, small volume, light weight and the like; and large-range, all-day and high-resolution dynamic and stable detection can be realized.

The invention relates to a water quality monitoring system based on a global positioning system and a general packet radio service. The system comprises a monitoring center and an inspection device arranged in a water area to be detected, wherein, the monitoring center comprises a PC server connected to Ethernet, a hard disk of backup data connected with the PC server and an operator network computer. The inspection equipment is connected with the Ethernet by a GPRS communication network and connected with the PC server by the Ethernet. The system can continuously, remotely and automatically detect the water quality of various water areas in real time, suffers from no water area restriction, has wide monitoring range and high monitoring density and can perform intuitive monitoring owing to the integration of a GIS system.

The sample stage of an array microscope is tilted in the scanning direction such that the best-focus plane of the array microscope intersects the surface of the sample during the scan. As a result of the tilt, the distance from the sample surface of each miniaturized microscope spanning the array varies from point to point on the surface. Accordingly, the best focal distance for each such point on the sample surface is identified by tracking the quality of its focus as the sample surface travels across the rows of microscopes in the array. Best focus may be detected using any known technique, such as by measuring spatial frequency content and recording the scan position corresponding to maximum mid-range frequency content. This information is used to develop a best-focus axial-position map for use while performing a subsequent measurement scan.

The invention discloses a wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique. The wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique comprises a visible channel and an infrared channel, wherein a light beam within the view field of the visible channel enters an optical system and then is reflected by an off-axis three-mirror primary mirror and an off-axis three-mirror secondary mirror to reach a third mirror in the visible channel, and after the exit pupil of the visible channel is filled with the reflected light beam, an image is formed at the position of the focus plane of the visible channel; a light beam within the view field of the infrared channel enters a third mirror in the infrared channel after being reflected by the off-axis three-mirror primary mirror and the off-axis three-mirror secondary mirror, the light beam reaches an intermediate-wave-and-long-wave color separation filter, a light beam in the intermediate wave view field is reflected through the front surface of the color separation filter, and an image is formed on the focus plane of an intermediate wave after the reflected light beam penetrates through an intermediate wave combined optical filter; a light beam in the long wave view field perpetrates through the intermediate-wave-and-long-wave color separation filter and then penetrates through a long wave combined optical filter, and then an image is formed on the focus plane of a long wave. The wide spectrum and multi-channel imaging optical system based on the middle image off-axis three-mirror technique has the advantages of being simple in structural mode, compact in structure, small in size, low in weight, large in number of spectrums, wide in spectrum section range, and capable of achieving wide-range, all-weather and high resolution dynamic monitoring.

The invention relates to a device and method for energy saving and consumption reduction of a dimethyl carbonate device. The method comprises the following steps that (a) a mixed material of propylene carbonate, methanol and methanol base catalysts passes through a heat exchanger and then enters a reaction rectifying tower for primary reaction and fractionation; a generated azeotrope of dimethyl carbonate and the methanol enters a pressurization rectifying tower after being condensed by a tower top condenser; (b) after the separation by the pressurization rectifying tower, light ingredients enter a methanol rectifying tower to be rectified; (c) an azeotropic composition at the tower top of the methanol rectifying tower is subjected to temperature rise and pressurization through a rectifying heat pump, and is then used as a heat source of a reboiler of the methanol rectifying tower; the azeotrope discharged from the reboiler respectively enters a feeding preheater and a condenser to be cooled through the reaction rectifying tower. The device and method provided by the invention have the beneficial effects that the energy consumption is reduced by 20.2 percent; the distribution of gas phase materials in the tower is more reasonable; the mass transfer separation efficiency of the rectifying tower is improved; in addition, the continuous and regular collection of liquid samples is realized; the product monitoring frequency is greatly improved; the device can be favorably regulated in time.

The invention relates to an open water surface cleaning device, in particular to a waterweeds collecting device. An algae collecting device comprises a scrapping device; the scrapping device is matched with a conveying device, and comprises a roller; a shell of the roller is provided with comb teeth in rows, of which the tail ends have arc structures, all comb teeth are arranged in the same direction; and a rotating shaft is arranged in the middle of the roller, and fixedly connected with a rotating wheel. The algae collecting device well overcomes the shortcomings of low manual operation efficiency, low safety and high labor intensity, and has the advantages of higher working efficiency, and capacities of improving the procedure of mechanical work to the utmost, reducing the manual labor intensity and being widely applied to the fishing operation in a sea area.

A high resolution stereo mapping and reconnaissance integrated camera optical system comprises a high resolution stereo detection branch and a laser ranging branch, wherein the high resolution stereo detection branch and the laser ranging branch adopt a shared primary mirror and a shared secondary mirror, adopt independent subsequent optical paths and independent optical elements, and form two independent optical branches. The two branches are different in field angles of incident light rays, a field out of an axis is utilized by the high resolution stereo detection branch, a field on the axis is utilized by the laser ranging branch, the light rays in the field of the two branches simultaneously reach the primary mirror and the secondary mirror, a light beam of the high resolution stereo detection branch passes though four aspheric surface reflecting mirrors and then reach a high resolution stereo detection focal plane to be imaged, and a light beam of the laser ranging branch passes through the primary mirror and the secondary mirror, then passes through an optical filter and laser relay lens set and then is converged on a laser focal plane. The high resolution stereo mapping and reconnaissance integrated camera optical system has the advantages that resolution is high, distortion is zero, an optical-mechanical structure is high in integration level, the size is small and the weight is light. The high resolution stereo mapping and reconnaissance integrated camera optical system achieves high resolution, high precision detection and stereo ranging mapping functions for large-range surface features.

The invention discloses a spatial light beam compression multichannel imaging optical system with a large field of view. The system comprises an off-axis three-mirror light beam compression afocal telescopic system, a second replicating mirror (5), a first color separation filter (6), a second color separation filter (7), a visible and near infrared relay lens group (8), a visible and near infrared focal plane device (9), a short wave relay lens group (10), a short wave focal plane device (11), a long wave relay lens group (12) and a long wave focal plane device (13), wherein the afocal off-axis three-mirror light beam compression optical system comprises a primary mirror (1), a secondary mirror (2), a first replicating mirror (3) and a third mirror (4). A target radiating light beam is compressed by the afocal off-axis three-mirror light beam compression optical system, emergent parallel light beams pass through the color separation filters and enter following visible and near infrared channel, medium wave channel and long wave infrared channel, and images are formed on focal planes of the channels by the relay lens groups of the channels. The optical system has the advantages that the optical system is large in field of view and relative aperture, wide in spectral range and easy to machine, assemble and adjust, and the like.

The invention provides a water sample gatherer and a water quality detection system. The water sample gatherer comprises a water collector, a water conduit, a flow diversion pipe and a water storage tank connected orderly. The water quality detection system comprises the sample gatherer and a water quality detection probe arranged in the water storage tank of the sample gatherer. The water quality detection system has a simple structure, can be installed and operated simply, and can take a water sample under the water surface out of the water surface without applied power and carry out water quality monitoring. The water sample gatherer and the water quality detection system are suitable for a field environment and are especially suitable for high-speed movement or high-speed water flow conditions. The water quality detection system can realize fast, accurate, continuous and automatic collection of a water sample at fixed water depth of a water surface layer, can realize accurate unmanned on-line synchronous detection of the quality of water at a sampling position, has an accurate water quality analysis result, and can really reflect a water quality distribution state.

The invention discloses a carotid artery three-dimensional image building device. The carotid artery three-dimensional image building device comprises a handheld scanning auxiliary device, an ultrasonic probe, an image frame capture module and a processing system. The ultrasonic probe is fixed to the handheld scanning auxiliary device; the handheld scanning auxiliary device drives the ultrasonic probe to move to enable the ultrasonic probe to be capable of continuously and stably collecting carotid artery two-dimensional slice images at different positions at a first speed; the ultrasonic probe is connected with the image frame capture module through a first data connecting line; the image frame capture module collects the carotid artery two-dimensional slice images transmitted by the ultrasonic probe at a second speed and transmits the collected carotid artery two-dimensional slice images to the processing system through a second data connecting line; the processing system extracts the carotid artery two-dimensional slice images collected by the image frame capture module at a third speed; and the carotid artery two-dimensional slice images are built into carotid artery three-dimensional images. By means of the carotid artery three-dimensional image building device, the carotid artery three-dimensional images used for auxiliary diagnosis can be accurately built.

The invention discloses a system and method for recognizing a power cable fault based on fractal and wavelet transform. The system comprises a current detection circuit module, a signal modulation circuit module, a data collecting card and a master control computer which are connected in sequence, wherein the current detection circuit module comprises an A-phase hall current sensor, a B-phase hall current sensor and a C-phase hall current sensor, and the signal modulation circuit module comprises an A-phase I / V switching circuit module, a B-phase I / V switching circuit module, a C-phase I / V switching circuit module, an A-phase signal amplifying circuit module, a B-phase signal amplifying circuit module, a C-phase signal amplifying circuit module, an A-phase filter circuit module, a B-phase filter circuit module and a C-phase filter circuit module. The method comprises the following steps that signals are detected in real time and uploaded synchronously; the signals are collected and saved; the cable fault is recognized. The system and method for recognizing the power cable fault based on the fractal and the wavelet transform has the advantages of being novel and reasonable in design, high in detection precision, stability and reliability due to the fact that the hall current sensors are adopted to detect the cable current, capable of easily, rapidly, accurately and effectively recognizing the type of cable short fault by means of the combination of the fractal method and the wavelet transform method, strong in practicability, good in using effect and convenient to popularize and use.

The invention discloses a handheld scanning device. The handheld scanning device comprises an auxiliary handheld scanning device, an ultrasonic probe and a drive control device. The auxiliary handheld scanning device comprises an H-shaped hollow shell, a scanning transmission mechanism fixed to the hollow shell, and an ultrasonic probe support in transmission connection with the scanning transmission mechanism. The ultrasonic probe is fixed to the ultrasonic probe support. The drive control device comprises a drive motor, a motor control box and an external master controller. The external master controller carries out driving control on the drive motor through the motor control box. The drive motor drives the scanning transmission mechanism to drive the ultrasonic probe support to move in a linear mode so that the ultrasonic probe can continuously and stably collect two-dimensional carotid artery section images at different positions. The handheld scanning device can continuously, accurately and stably collect the two-dimensional ultrasonic images.

The invention relates to the technical field of three-dimensional laser scanning, and specifically, relates to a key technique of three-dimensional laser scanning in deformation monitoring. The key technique comprises a three-dimensional laser scanner measurement general step: deformation detection articles are scanned and measured through a three-dimensional laser scanner, data measured and scanned by the three-dimensional laser scanner is transmitted to processing software for processing, 3D modeling is carried out on the scanned data through the processing software, and data comparison is carried out through 3D modeling models formed in different periods; and a three-dimensional laser scanner measurement specific step. The beneficial effects of the invention are that the technique can achieve denoising of the point cloud data through the cyclon5.8 software, data volume is reduced, the data processing speed is increased, the working efficiency of the three-dimensional laser scanner is improved, and the data can be quickly, continuously and automatically acquired; the precision is high, the density is high, the efficiency is high, and the cost is low; and a three-dimensional datamodel for real description production is improved, and locality and one-sidedness caused by data-based analysis are effectively avoided.

The invention discloses a gap discharge characteristic test platform influenced by multiple factors under the simulated mountain fire condition. The test platform is used for simulating the practical environment of a transmission line corridor so as to obtain the breakdown characteristics of a gap under different combustion conditions, and quantitative research is further carried out on a tripping mechanism of a power transmission line under the mountain fire condition. The test platform comprises a test power source, a water resistor, a voltage divider and a sealed laboratory. A first electrode, a second electrode, a heat insulation plate, a resistor box, a weight sensor, a DV camera, a high-speed camera, an infrared thermometer, a fan, a particular generator and a signal collecting system are arranged in the sealed laboratory. By means of the gap discharge characteristic test platform influenced by the multiple factors under the simulated mountain fire condition, contrast tests of the gap under different combustion conditions can be carried out conveniently, the problem that the test factors of an existing test platform are single is solved well, and the quantitative research of the breakdown characteristics of the gap under the mountain fire condition is possible. The test platform is easy to operate, high in adaptability and capable of meeting the design requirement.

The invention discloses a movable emergency monitoring system which comprises a movable terminal and a hospital system terminal. The movable terminal is provided with a medical clinical facility, a collecting facility and a movable digital terminal. The system terminal comprises a server and a client terminal. The collecting facility mainly collects medical clinical information produced by the medical clinical facility and the information is connected with internet through mobile technology, and then the collected data of a patient is transferred to the server terminal and is transmitted to the client terminal. The mobile data terminal reads the existing data in the system terminal server through a wireless network. The mobile emergency monitoring system of the invention which has interactivity and real-time property can collect patient data at the mobile terminal in real time and can obtain the existing data of the patient at the hospital system terminal simultaneously in time, achieving dynamic monitoring the changeable state of the illness of the patient being salved, improving salving efficiency and winning time for salving.

The present invention provides a navigation satellite signal processing system. It includes a signal acquisition device, and is characterized by that the described signal acquisition device has computer interface whose data transmission rate is greater than 12Mbit / s. The adoption of said system can implement real-time, continuous and long-period acquisition of navigation satellite signal, and can directly transfer the signal data into computer.

The invention discloses a method for intelligently acquiring physiological information in a body sensor network. The health of an acquired object in the body sensor network is estimated by analyzing the conventional physiological information data of the acquired object, and the physiological information of the acquired object is intelligently acquired in a classified mode according to the estimated health grades. The problems of too much useless physiological information and interference of wrong physiological information which are caused by non-differential treatment on the acquired object in the conventional acquisition method are solved, the sending volume of the acquired physiological information is reduced and efficient acquisition of the physiological information of the acquired object in the body sensor network is realized.

The invention discloses an omnidirectional inter-satellite communication link based on double-satellite flying-around formation. The omnidirectional inter-satellite communication link based on double-satellite flying-around formation includes an omnidirectional inter-satellite communication antenna array, radio frequency channels, an inter-satellite link management unit, and inter-satellite basebands, wherein the inter-satellite link management unit controls two channels of inter-satellite basebands to transmit-receive the data of a set of inter-satellite radio frequency channels; an inter-satellite link formed by the two channels of inter-satellite basebands, the radio frequency channels and the inter-satellite antenna link implements heterogeneous synchronous transmission and reception of inter-satellite data; the inter-satellite link of each satellite can simultaneously capture, track and select the two channels of heterogeneous signals of other satellites; the rate can be independently adjusted according to whether the current inter-satellite distance and the inter-satellite communication are normal; and configuration and control of the operating mode of the inter-satellite link can be managed synchronously by the inter-satellite link management unit. The omnidirectional inter-satellite communication link based on double-satellite flying-around formation solves the problemthat omnidirectional communication cannot be realized due to existence of a traditional omnidirectional array antenna interference zone.

The invention relates to a three-mode small animal imaging system integrating fluorescence, nuclei and X rays, which is characterized in that the system comprises a machine body, a support frame is arranged in the machine body, and a fluorescence imaging system, a nuclei imaging system and an X ray imaging system are respectively fixed on the support frame; the fluorescence imaging system and thenuclei imaging system are arranged on the inner side of the machine body and form orthogonal in geometry, and the X ray imaging system is arranged at an inlet side of the machine body side by side with the fluorescence imaging system and the nuclei imaging system; the fluorescence imaging system comprises an excitation light source board, and a CCD (Charge Coupled Device) camera is arranged abovethe excitation light source board; the nuclei imaging system comprises two PET (Positron Emission Tomography) detectors which are arranged at the two sides of the excitation light source board in parallel at intervals; and the X ray imaging system comprises a horizontal flat panel detector, and an X ray spherical tube is arranged above the flat panel detector. A new measure and a new tool are provided for modern biological and medical research, and the system can be widely used in modern biological and medical research.

A space refraction and reflection type multichannel imaging optical system comprises a main lens, a refraction and reflection type secondary lens, a third lens, a switching reflection lens, a color separation film, a shimmer channel focal plane device, and a visible light and near-infrared channel focal plane device. After the radiation beam of an imaging object is reflected through the main lens, the light beam of a visible light and near-infrared channel reaches the color separation film, and then forms an image at the position of a visible light channel focal plane after being reflected and transmitted through the front surface and the rear surface of the refraction and reflection type secondary lens and then reflected through the third lens. The light beam of a near-infrared channel transmits through the color separation film and forms an image at the position of the near-infrared focal plane device. After the switching reflection lens is switched and a light path is switch-in, the light beam of a shimmer channel is reflected through the main lens and then reflected through the refraction and reflection type secondary lens and the third lens and then is incident to a shimmer and visible near-infrared switching reflection lens, and the light beam of the shimmer channel is reflected through the front surface to be incident to the shimmer channel focal plane device to form an image. The space refraction and reflection type multichannel imaging optical system is simple in model, compact in structure, small in size, low in weight, large in visual field, capable of achieving a large-range and high-resolution dynamic monitoring function in daytime, morning and dusk.

The invention provides a non-fixation wristband type pulse collecting system and method. The collecting system comprises an optical sampling wristband and an intelligent terminal, the optical sampling wristband is worn by a tested object and does not need to be tightly attached to the skin of the wrist of the tested object, light emitted by the inner side face of the optical sampling wristband is reflected by the skin, then received by the inner side face of the optical sampling wristband and converted into optical data corresponding to the reflected light of the skin of the wrist to be recorded, the wristband transmits the optical data corresponding to the reflected light of the skin of the wrist to the intelligent terminal to be analyzed and processed, and the intelligent terminal utilizes the optical data corresponding to the reflected light of the skin of the wrist within a continuous period, so that real-time pulse signals of the tested object are obtained. The wristband and the intelligent terminal can be carried about, according to the system, pulses are sampled through optical signals, the pulse signals can still be obtained in the moving process of the tested object, and therefore the system has good portability and real-time performance. In addition, the system can encrypt the optical data and is good in safety because only the specific intelligent terminal can obtain the pulse signals of the tested object.

The electronystagmograph consists of infrared video nystagmus image collection device, eyeball motion tracing system, computer analysis processing system and nystagmus monitor, of which the said infrared video nystagmus image collection device is connected in video signal connection with the eyeball motion tracing system which is connected in electric connection with the computer analysis processing system, and the computer analysis processing system is connected in video signal connection with the said nystagmus monitor. The present invention provides also an automatic generation method for video electronystagmogram which can effectively storten clinical detecting time by real-time recording and analysing of physiological parameter for nystagmus at vertical parallel are rotary directions.

A patch-type sensor module is provided. A patch-type sensor module according to one embodiment of the present invention comprises: a power supply unit electrically connected with a flexible circuit board; a sensing unit which is mounted on the flexible circuit board and includes a temperature sensor for measuring a user's body temperature; a communication unit which allows power to be supplied using a wake-up function, wherein a pairing with an external communication module is concurrently established when power is supplied, and information measured through the sensing unit is then transmitted to the external communication module; a control unit for controlling operations of the power supply unit, the sensing unit, and the communication unit; and a protection member for preventing the flexible circuit board, the power supply unit, the sensing unit, the communication unit, and the control unit from being exposed to the outside.

The present invention discloses a wearable type online electrocardiogram monitoring and cardiac function evaluation system. The system comprises a wearable type electrocardiogram acquisition device, the wearable type electrocardiogram acquisition device collects electrocardiogram signals, performs electrocardiogram signal pretreatment, communication error correction and temporary storage to determine environment ranges of wearers, and sends the electrocardiogram signals to a client side or a central server; the client side receives the electrocardiogram signals sent by the wearable type electrocardiogram acquisition device and transmits the electrocardiogram signals to the central server; and the central server receives the electrocardiogram signals sent by the wearable type electrocardiogram acquisition device or the client side, extracts electrocardiogram indicators, compares changed waveforms of the extracted electrocardiogram indicators with stored standard waveforms, also conductsanalysis of preset warned electrocardiogram characteristics, finishes electrocardiogram monitoring and cardiac function evaluation, and obtains cardiac function evaluation results.

The invention discloses a self-enclosed peripheral blood collection pipe which comprises a collection pipe and a gathering pipe, wherein the collection pipe is made of polypropylene, and the inner wall of the collection pipe is siliconized; a pipe cap sleeved with a pipe mouth at the top of the gathering pipe is arranged, the pipe cap is made of elastic materials and composed of a cap cover and a cap body; the cap body is a cylindrical component with an H-shaped axial cross section, and the cap cover is a valgus flange edge connected to the top of the cap body; the outer wall of the lower end of the cap body is provided with 3-5 raised arc rings so as to form an elastic tension structure; and the lower-middle part of the inner wall of the cap body is connected with a sealing cover, and the sealing cover is a thin-wall component with a V-shaped axial cross section and provided with 3-6 straight slits passing through the center of the sealing cover so as to form a self-enclosed structure. The self-enclosed peripheral blood collection pipe disclosed by the invention is simple in structure and easy to operate; the acquisition process is continuously performed in an enclosed mode; the acquisition time and collection time are short, and the acquisition and collection efficiencies are high; and the biochemical pollution caused by shifting in the acquisition process can be avoided.

The invention relates to a testing device and method of vehicle dark current. The device comprises a power source (1), a power source module (2), a clock battery (3), a USB interface (4), a storage (5), a single-chip microcomputer module (6), a wireless communication module (7), a full storage indication lamp (8), a Lin transceiver (9) and a storage battery sensor (10). The device and method are applicable to testing a vehicle with a storage battery sensor matched with the Lin communication interface, the technical problem about continuous and real-time collection and storage of storage battery dark current property data is solved, storage battery property data in the storage is transmitted to a data storage server in real time through a 3G wireless communication module, and dark current property data remote continuous storage, remote real-time monitoring and comprehensive evaluation functions are achieved.

A method for controlling a spectral Doppler ultrasound imaging device adapted for operating both in a spectrum-live Doppler measurement mode (S3) and in an image-live measurement mode (S1, S6) is proposed. In accordance with the present invention, the method comprises automatically switching to the image-live measurement mode (S6) upon detection (S5) of a change of a sampled region. A change of a sampled region may be indicated by an operator by actuating a sampled region control device such as a trackball, angle knob or sample gate controller and, upon such actuation, the spectral Doppler ultrasound imaging device may automatically switch to the image-live measurement mode (S6) to allow for adapting or correcting of a position and / or orientation of the sampled region. After the sampled region has been positionally stable for a predetermined duration, the spectral Doppler ultrasound imaging device may be switched back (S7) to the spectrum-live measurement mode (S3). Thereby, unnecessary manual toggling between different measurement modes may be avoided and quantitative spectrum-live Doppler measurement (S3) is enabled being interrupted only when necessary, i.e. when a sampled region is changed.

The invention discloses a handheld auxiliary scanning device. The handheld auxiliary scanning device comprises an H-shaped hollow shell, a scanning transmission mechanism fixed to the hollow shell, and an ultrasonic probe support in transmission connection with the scanning transmission mechanism. A handheld handle is formed by the two lower ends of the H-shaped hollow shell, an ultrasonic probe is fixed to the ultrasonic probe support, and the scanning transmission mechanism drives the ultrasonic probe support to move in a linear mode so as to enable the ultrasonic probe to continuously and stably collect two-dimensional carotid artery section images at different positions. When used in cooperation with the ultrasonic probe, the handheld auxiliary scanning device can assist the ultrasonic probe to continuously, accurately and stably collect the two-dimensional ultrasonic images.