103 results about "Non-contact ultrasound" patented technology

The invention discloses a method of shape and property control of electric arc additive manufacturing through assistance of ultrasonic vibration. In the process of electric arc additive manufacturing, non-contact ultrasonic vibration is applied to molten baths synchronously, grains in the molten baths are crushed, growth of the grains is restrained, and refinement of the grains is achieved. Meanwhile, by effectively utilizing residual heat of a formed part, the effect that a material in the position where a tool bit makes contact with the surface of a cladding layer is in a softened state is guaranteed, by applying ultrasonic vibration to the tool bit, the tool bit impacts the surface of the cladding layer at a high frequency, and finishing processing and surface reinforcing treatment are conducted on the surface, so that the dimension precision of the cladding layer is improved, the residual stress of the cladding layer is reduced, the surface grains are refined, and accordingly the purpose of shape and property control of electric arc additive manufacturing is achieved. According to the method, the roughening effect of the residual heat accumulation amount to the part grains and severe influences of warping deformation are reduced and even avoided, the service cycle of the tool bit is prolonged, and subsequent machining treatment of parts is reduced. The effective method is provided for shape and property control of the electric arc additive manufacturing technology.

The invention discloses a method for measuring the existence of powdery materials in a specific material position of a container and an implementation material level switch thereof. The material level switch is a non-contact type ultrasonic material level switch and is implemented at a material level detection point of the container, detection ultrasonic waves are discontinuously emitted to the container in the production operation according to the set time interval in a direction vertical to the axial line of the container from a position outside the wall surface of the container, the obtained reflection echo signals of the interface between the inner wall surface of the container and media inside the container is subject to intensity comparison with the pre-measured calibration echo signals of the interface between the inner wall surface of the container and the media inside the container stored in a memory when the powdery materials are added into or not added into the container, and whether the powdery materials exist in the material level detection point of the sealed container or not is judged, so the detection and the control on the specific material level of the powdery material container are realized. The method belongs to the technology for carrying out material level detection in a way without contacting the powdery materials in the container, and has the advantages that the detection results are reliable, the service life of the material level switch used as a detection device is long, and the like.

The invention discloses a partial discharge routing inspection device applicable to multiple detection methods. The device comprises an ultrahigh-frequency sensor with the frequency band ranging from 500 MHz to 1.5 GHz, a high-frequency current sensor with the frequency band ranging from 0.5 MHz to 50 MHz, a ground electric wave sensor, a contact ultrasonic sensor and a non-contact ultrasonic sensor. The ground electric wave sensor and the non-contact ultrasonic sensor are arranged inside a host, the ultrahigh-frequency sensor and the high-frequency current sensor transmit data to the host in a wireless mode through a wireless collection module, the host is mainly composed of a signal collection unit, a data processing module and a human-computer interaction interface, and the host analyzes collected partial discharge data, judges whether partial discharge exists or not, analyzes the partial discharge type and evaluates working conditions of high voltage electric power equipment. The partial discharge routing inspection device is compact in structure and convenient to carry, has multiple detection functions and effectively detects partial discharge of the high voltage electric power equipment on site with the multiple detection methods.

A system and method for generating ultrasound images of a subject without physically contacting the subject is provided. A photoacoustic excitation source may be employed that directed into a scanning mirror to transmit acoustic disturbances into a patient to induce propagating photoacoustic waves. The acoustic disturbances are translated along the patient in a defined direction to cause coherent summation of the propagating photoacoustic waves and, thereby, a resultant acoustic and/or elastic wave to probe structures within the patient. Vibrations created by the backscatter of the resultant wave are detected at the surface of the patient and ultrasound images of the structures within the patient are generated. Detection of the vibrations may be performed using a laser vibrometer. The excitation and detection systems may be used separately or in combination.

The invention discloses a partial discharge comprehensive itinerant detector for high voltage electric power equipment. The partial discharge comprehensive itinerant detector for the high voltage electric power equipment is characterized by comprising a host and a sensor group connected with the host, wherein the sensor group comprises a transient state ground potential sensor, an ultrahigh frequency electromagnetic wave sensor, a non-contacting ultrasonic sensor and a contacting ultrasonic sensor; the transient state ground potential sensor is used for detecting a current pulse signal on the shell of the electric power equipment; the ultrahigh frequency electromagnetic wave sensor is used for detecting an electromagnetic wave signal transmitted from the inside of the electric power equipment; the non-contacting ultrasonic sensor is used for detecting an ultrasonic wave signal transmitted from the inside of the electric power equipment; the contacting ultrasonic sensor is used for detecting shell vibration caused by the ultrasonic wave signal transmitted from the inside of the electric power equipment; and the transient state ground potential sensor, the ultrahigh frequency electromagnetic wave sensor, the non-contacting ultrasonic sensor and the contacting ultrasonic sensor are all connected with the host. According to the partial discharge comprehensive itinerant detector, a transformer, a composite apparatus (gas insulated switchgear) and a switch cabinet can be conveniently subjected to partial discharge electrification detection, and the partial discharge comprehensive itinerant detector for the high voltage electric power equipment has the outstanding advantages of convenience in carrying the instrument, as well as quickness and intellectualization in detection.

Both a method and apparatus for determining internal discontinuities or inhomogeneities in a green or fired ceramic honeycomb structure is provided. In the method of the invention, an ultrasonic transmitter is positioned adjacent to, but not in contact with, the honeycomb structure. The transmitter propagates an ultrasonic wave, of preferably less than 5 MHz, through the honeycomb structure which is received, filtered and analyzed to determine the presence or absence of internal discontinuities or inhomogenieties. The ultrasonic transmitter generates an ultrasonic wave of less than five megahertz to provide a relatively high signal-to-noise ratio in the ultrasonic wave propagated through the structure. The device of the invention may include an array of ultrasonic transmitters and receivers that generate simultaneously transmit and receive ultrasonic signals throughout the ceramic honeycomb structure as it is moved relative to the array such that the structure is quickly and efficiently scanned for discontinuities or inhomogenieties.

The invention relates to a high-precision aspheric surface ultrasonic polishing method for small-aperture brittle high-hardness materials, and discloses a non-contact type ultrasonic surface shape correcting and polishing method and a device thereof. A bristle hard alloy material is polished by the aid of propagation characteristics of ultrasonic simple harmonic vibration, which is generated by acircular oscillator, in liquid, and a stable material removing function in Gaussian distribution can be realized. After a polishing path covering an integral processed surface is set, dwell time of atool head at each of points on the polishing path is determined according to the obtained material removing function and residual errors of the processed surface, and a processing program is scheduled and inputted into a numerical-control machine tool to realize correcting and polishing processing. Accurate control of material removal amount of different areas of the surface by means of combiningthe numerical control technology, surface shape correcting and polishing of various optical surfaces such as planes, spherical surfaces, aspheric surfaces and the like can be realized, and optical surfaces with high surface shape precision can be obtained.

The invention discloses a non-contact ultrasonic flow velocity meter. The non-contact ultrasonic flow velocity meter comprises an ultrasonic transducer, an electronic circuit and a flow display and accumulation system, wherein the ultrasonic transducer comprises an ultrasonic emission transducer and an ultrasonic receiver; the ultrasonic emission transducer is used for converting electric energy into ultrasonic energy, and emitting the ultrasonic energy to the detected flow; the ultrasonic receiver is used for receiving ultrasonic signals and sending the ultrasonic signals to the electronic circuit; the electronic circuit comprises an emission unit, a receiving unit and a signal processing unit; the receiving unit is used for receiving the ultrasonic signals sent from the ultrasonic receiver and sending the ultrasonic signals to the signal processing unit to process the signals; and the emission unit sends the signals processed by the signal processing unit to the flow display and accumulation system. As the non-contact ultrasonic flow velocity meter installs the ultrasonic emission transducer and the ultrasonic receiver on the outer wall of a pipeline to be detected, flow detection when the water flow is opened wide can be performed, and no detection elements are required to be installed in the flow while the flowing state of the flow is not changed.

A method for assessing technical parameters of narrow-band non-contact ultrasonic partial discharge testing instruments for power systems is characterized in that sinusoidal analog voltage signals which are outputted by a function generator, are adjustable in amplitude value and have the frequency of 40 kHz are used for driving a narrow-band ultrasonic emitter to generate space ultrasonic waves of which the radiant power can change in the forward direction; and for an ultrasonic testing instrument adopting a narrow-band non-contact manner, the sensitivity amplitude value, the directional included angle, the effective testing distance, the rangeability and other technical parameters are assessed practically. The method is combines the characteristic of integrative packaging number value display of a narrow-band non-contact ultrasonic partial discharge testing instrument, starts with the spread principle of space ultrasonic radiation, aims at the core technical parameters such as sensitivity, directionality, attenuation characteristic and rangeability, utilizes the function generator to solve the assessment problem of such equipment from the angle of space ultrasonic radiation, and has the remarkable advantages of portability, intuitiveness, accuracy, quantification, capability of repetition measurement, and the like.

The invention discloses an examination and verification device for a noncontact ultrasonic method partial discharge detector and an examination and verification method thereof. The device part comprises a signal excitation source, an ultrasonic transducer module, a verification platform, a reference sensor, an oscilloscope and a 50ohm coaxial cable. A detected instrument comprises a detected sensor and a partial discharge detector. The detectable items include sensitivity, detection frequency band, linearity and stability. The test method is easy to realize and easy and rapid to debug, and the test process is convenient and rapid so that the device is suitable for routine maintenance, testing, correction and other performance examination of the noncontact ultrasonic method partial discharge detector of the power detection industry and can guarantee effectiveness and reliability of the detection instrument.

The present invention is cylindrical non-contact ultrasonic motor, and belongs to the field of miniature motor. The motor consists of stator, rotor and seat. The motor stator consists of stator base body and piezoelectric ceramic adhered together. The motor rotor consists of rotor base body, one pair of shaft sleeve and shaft. The motor seat consists of cover plate, pedestal, sleeve, one pair of washers, one pair of bearings, screw, nut, etc. When some AC voltage in ultrasonic frequency range is applied, the stator generates ultrasonic vibration, the rotor is rotated via adhesive force, and the power is output via the shaft. The motor has the advantages of high rotation speed, long service life, simple structure, low cost, etc.

The invention discloses a non-contact type ultrasonic flaw-detecting machine for a hollow car axle. The non-contact type ultrasonic flaw-detecting machine comprises a chassis, a machine body, a feeding mechanism, a detection control system and a lifting mechanism, wherein a universal walking wheel is arranged at the bottom of the chassis; a control handle is arranged on one side of the chassis; the lifting mechanism is mounted on the upper surface of the chassis which is located on the other side opposite to the control handle mounting side; the feeding mechanism is arranged on the machine body between the control handle and the lifting mechanism. Compared with the prior art, the non-contact type ultrasonic flaw-detecting machine for the hollow car axle is used for detecting the hollow car axle by using a non-contact ultrasound wave pulse reflection method; the detection control system is used for controlling the feeding mechanism to drive a flaw-detecting rod to move forth and back along with the inner surface of the hollow car axle; a probe carrier at one end of the flaw-detecting rod rotates under the driving of a rotation motor, so that a probe on the probe carrier is capable of automatically detecting the hollow axel in all directions and accurately detecting transverse flaws and vertical flaws on the inner surface and the outer surface of the hollow car axel and material defects in the hollow car axel.

The invention belongs to the technical field of detection, and relates to large wall plate ultrasonic on-machine non-contact scanning thickness measuring equipment and a thickness measuring method. The equipment adopts a gantry type numerical control machine as a measuring machine main body, a to-be-measured large wall plate is clamped on the gantry type numerical control machine, and scanning measuring movement is carried out; a non-contact type ultrasonic measuring device is installed on a main shaft of the numerical control machine and is used for emitting and collecting ultrasonic signals;and a coupling agent circulating system with multi-layer filtration, flow monitoring and regulation functions is built, a jet-flow fluid-immersion coupling mode is adopted on the surface of the to-be-measured large wall plate, a microemulsion cutting fluid is used as a compatibility coupling agent of the ultrasonic on-machine thickness measuring, and the coupling agent is recycled, purified and subjected to circulating steady supply. According to the large wall plate ultrasonic on-machine non-contact scanning thickness measuring equipment, the structure is simple, the functional integration degree is high, and the performance is reliable; and the operation is easy and convenient, the automation degree is high, and the nondestructive, precise and efficient on-machine measurement of the wall thickness of the large wall plate is realized effectively.

A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye in a non-contact manner by use of an ultrasonic wave comprises: a probe that emits an ultrasonic beam to be allowed to enter the eye and detects the ultrasonic beam reflected by the eye; and an arithmetic section that determines the intraocular pressure by processing an output signal from the probe, the probe including a broadband air-coupled transducer that transmits and receives the ultrasonic beam having a broadband frequency component.

The invention relates to a non-contact ultrasonic thickness gauge with high detection precision. The non-contact ultrasonic thickness gauge comprises a main unit, a connecting line, a holding rod anda detection box; the detection box is internally provided with a detection mechanism and two polishing mechanisms, each polishing mechanism comprises a side plate, a shrinking plate, a shrinking assembly, a reciprocating assembly, a reciprocating plate and a polishing assembly, each polishing assembly comprises a polishing block, a plurality of springs and two orientation units, each orientation unit comprises an orientation rod and a bump, and the detection mechanism comprises a lifting assembly, a lifting plate, a steering assembly, a steering plate, a probe and a plurality of contact rods.According to the non-contact ultrasonic thickness gauge with the high detection precision, the polishing blocks move back and forth on the surface of a workpiece through the polishing mechanisms, ruston the workpiece is eliminated, the workpiece is restored to be smooth, and the detection is facilitated; moreover, the direction of the probe is adjusted through the detection mechanism so that theprobe can be aligned with the workpiece, the probe is prevented from wear while the detection precision is improved, the service life of the probe is prolonged, and the practicability of the gauge isimproved.

The invention relates to the technical field of early warning equipment, and discloses a method for reckoning flood and overflow occurrence time according to meteorological data, which comprises the following steps of 1) installing non-contact ultrasonic water level gauges in culverts, pools, reservoirs, lakes and the like which need early warning in advance. According to the method for reckoningflood and overflow occurrence time according to meteorological data, associated determination is carried out through rainfall of different levels and water level changes, an initialized calculation model can be automatically established by accumulating real data to acquire and classify original data generated by rainfall of six levels in real time, therefore, the volume of an area needing to be calculated does not need to be measured manually, and the calculation accuracy is improved by refining the minimum calculation unit time and the rainfall water level. Meanwhile, the more the accumulated data is, the longer the use time is, the higher the calculated data and the foreseeable accuracy are, manual calibration is not needed; and the equipment is low in overall cost and low in human input and maintenance cost.

Apparatus for determining the speed of sound through a specimen comprises an ultrasound sending transducer, an ultrasound receiving transducer, a pair of laser distance sensors, a display device, a controller in communication with the ultrasound sending transducer, the ultrasound receiving transducer and the pair of laser distance sensors and the display device. The ultrasound sending transducer and one laser distance sensor are supported with a transducer surface in a first plane. The ultrasound receiving transducer and one last distance sensor are supported with a transducer surface in a second plane parallel with the first plane. A support for a specimen is provided between the first and second planes. The controller is programmed for gathering data from the ultrasound transducers and the laser distance sensors for calculating the speed of ultrasound in the specimen and displaying the results.

A non-contact ultrasonic tonometer for measuring intraocular pressure of an examinee's eye in non-contact manner by use of an ultrasonic wave comprises: a probe including a vibrator for making the ultrasonic wave incident on the examinee's eye and a sensor for detecting the ultrasonic wave reflected from the examinee's eye; and an observation optical system for observing an anterior segment of theeye, wherein the probe is placed in an optical path of the observation optical system, and the observation optical system forms an image of the anterior segment through a surrounding region of the pr obe.

Electric motors and generators, in which a non-contact ultrasonic suspension of the rotor of the electric motor, are provided. The non-contact ultrasonic suspension is achieved by the formation of an elevated-pressure gaseous microfilm between conjugated surfaces of saddle-resonators and trunnions of a bearing system.

The invention discloses a high-precision automatic sampling and calibrating ultrasonic liquid level monitoring system, which comprises an ultrasonic probe, a transmitter, power supply equipment, a container and a server platform, wherein the ultrasonic probe comprises a sampling probe and a monitoring probe; the transmitter comprises a sensor drive circuit, a signal processing circuit, a wireless communication module, a locating module, an output interface circuit, a power supply management circuit and a single chip microcomputer; the power supply equipment comprises an external DC power supply and a standby battery. According to the high-precision automatic sampling and calibrating ultrasonic liquid level monitoring system, by adopting an externally bonded non-contact ultrasonic measurement technology, when the liquid changes under different factors such as a temperature, air pressure and a container, high-precision measurement of the liquid level can be ensured through automatic calibration; when liquids of different density are measured, the problems of poor compatibility, difficulty in calibration method and low measurement accuracy are solved; and meanwhile, by using a wireless technology and a locating technology, wireless fixed-point real-time monitoring of liquid level data is achieved.

The invention relates to the technical field of equipment detection, in particular to a storage tank bottom plate detection system. The system comprises mobile detection equipment and terminal equipment. The mobile detection equipment and the terminal equipment are arranged on the liquid level of a storage tank containing liquid. The mobile detection equipment is used for receiving wireless control signals, being controlled to move to the preset position of the liquid level according to the wireless control signals, transmitting ultrasonic waves to a storage tank bottom plate at the preset position and receiving the ultrasonic waves reflected by the storage tank bottom plate. The terminal equipment is used for analyzing and processing the reflected ultrasonic waves, and analyzed and processed detection data of the storage tank bottom plate is obtained. The detection data at least comprises the corrosion position data and corresponding corrosion degree data. The online detection efficiency and accuracy of the system are high, through the non-contact type ultrasonic detection technology, the operation complexity and the construction cost are low, and therefore good practicality is achieved.

The invention discloses an ultrasonic detecting system and method. The ultrasonic detecting system is used for detecting lithium batteries and comprises a detecting portion, a transmitting portion, a sorting mechanism, wherein the detecting portion is used for detecting swelling of the lithium batteries, the transmitting portion is used for bearing and moving the lithium batteries, the transmitting portion is further connected with the detecting portion, and the sorting mechanism is arranged above the transmitting portion, connected with the detecting portion and used for sorting the lithium batteries with the swelling. The ultrasonic detecting system has the advantages and the beneficial effects of achieving a non-contact type ultrasonic detecting effect and having high flexibility, strong penetrating power, good directivity, quick detecting speed, low cost, relatively simple equipment and no harm to a human body. The ultrasonic detecting system also has the advantages of avoiding coupling agent, keeping longer distance with an object to be detected, having a simple and convenient detection process, improving the automation degree of lithium battery detection, greatly saving labor consumption of a battery swelling detecting process, reducing production cost, being beneficial to solving the problem that the efficiency and the accuracy are not high in manual product detection and greatly improving the production efficiency.

The invention discloses a method for efficiently preparing a fat source biomaterial by using ultrasonic wave. The method comprises the steps of centrifugation, ultrasonic wave breaking (including contact type and non-contact type ultrasonic wave), centrifugal collection and the like. According to the method, the ultrasonic wave is utilized to break most mature fat cells in fat tissues, and the flocculation centrifugal sedimentation technology is applied to collect oil droplets generated by breaking the mature fat cells to achieve the purpose of enriching SVFs; high-speed centrifuging is utilized to remove cellular components to obtain ECM. After ultrasonic treatment, the cell activity is greatly improved, and the apoptosis rate is greatly reduced, so that the effectiveness of the transplantation is greatly improved. At the same time, an ECM biomacromolecule material can be obtained, and the low ECM content and the cytokine loss caused by the cumbersome operation are avoided. The biomaterial obtained by the method can be used for the autologous transplantation biological therapy, reduces the complications of fat transplantation and improves the survival rate of transplanted fat.