191results about "Converting sensor ouput using wave/particle radiation" patented technology

The invention relates to the field of intelligent detection of power transmission and transformation equipment, in particular to an ultrasonic sensor for the power transmission and transformation equipment. The ultrasonic sensor comprises a substrate, a bottom electrode layer, a top electrode layer and a three-dimensional piezoelectric film, the three-dimensional piezoelectric film is located between the bottom electrode layer and the top electrode layer, the three-dimensional piezoelectric film is integrally arranged on the substrate, and the three-dimensional piezoelectric film is insulated from the bottom electrode layer and the top electrode layer; the bottom electrode layer and the top electrode layer are composed of interdigital electrode arrays. The three-dimensional piezoelectric film is formed by compositing nanowires and a polyvinylidene fluoride heterostructure through an electrostatic spinning process. The nanowire is a rare earth element doped ZnO nanowire synthesized by a hydrothermal method. According to the invention, the material sensitivity is improved, the stability of the ultrasonic sensor in a high-temperature / high-humidity environment is enhanced, and high-precision detection of high-frequency ultrasonic waves generated by partial discharge of power transmission and transformation equipment is realized.

The invention discloses an ultrasonic transducer and an ultrasonic sensor, and relates to the field of ultrasonic sensors.The ultrasonic transducer comprises a probe assembly, a flexible sleeve and a rigid connecting piece, and the probe assembly is arranged in a barrel shape or a step barrel shape; the probe assembly is sleeved with the flexible sleeve, and at least part of the flexible sleeve extends in the circumferential direction of the probe assembly; the rigid connecting piece is fixed to the flexible sleeve and used for being fixed to an installation assembly of the ultrasonic sensor so that the ultrasonic transducer can be installed on the installation assembly. Wherein in the direction perpendicular to the ultrasonic transmitting / receiving surface, the size of the rigid connecting piece is smaller than that of the flexible sleeve / probe assembly; in the radial direction, the size of the rigid connecting piece is larger than the size of at least part of the flexible sleeve / probe assembly. Therefore, the vibration propagation efficiency is reduced through the flexible sleeve and the rigid connecting piece, ultrasonic waves are prevented from being transmitted to the rigid connecting piece, and resonance formed by the ultrasonic transducer and the mounting assembly is avoided.

The invention discloses a cascade cooperative measurement method for electromagnetic ultrasonic thickness measurement modules, which is characterized by comprising the following steps of: (1) forming a cascade measurement system by adopting a plurality of electromagnetic ultrasonic thickness measurement modules, and connecting the modules through cascade interfaces, the electromagnetic ultrasonic thickness measuring modules are sequentially defined as a first channel module, a second channel module,..., and an nth channel module along a cascade sequence; (2) the channel modules are sequentially staggered to enter an ultrasonic transmitting and receiving work cycle; and (3) transmitting trigger pulse signals at intervals by each channel module in a mode of gradually increasing interval time in an ultrasonic transmitting and receiving work period, and performing ultrasonic transmitting and receiving work. According to the cascade cooperative measurement method, cooperative measurement of multiple channel modules can be realized, the overall measurement efficiency can be improved while mutual interference of the channel modules can be avoided, and the cascade cooperative measurement method is adaptive to the multi-measurement-point high-speed scanning requirement of a large component.

The invention relates to a wireless passive three-signal sensor and a preparation method, and belongs to the technical field of sensor manufacturing, the wireless passive three-signal sensor comprises a piezoelectric substrate, the piezoelectric substrate is provided with a hydrogen sensitive film, a temperature sensitive film, a strain sensitive film, an IDT and a reflecting grating, the hydrogen sensitive film, the temperature sensitive film and the strain sensitive film are located on the surface of the piezoelectric substrate at intervals, and the IDT and the reflecting grating pass through the surfaces of the hydrogen sensitive film, the temperature sensitive film and the strain sensitive film and correspondingly adopt different IDT center frequencies and interdigital periods. According to the invention, synchronous monitoring of three parameters of temperature, strain and hydrogen can be realized in a wireless passive mode, and the system can be applied to various scenes requiring multi-parameter monitoring, thereby providing reliable technical support for monitoring in related fields.

The application discloses a manufacturing method of a flexible ultrasonic probe and belongs to the technical field of sensors for agricultural machinery. The flexible ultrasonic probe comprises a lower substrate layer, a lower electrode layer, a lower adhesive layer B, a transducer layer, an upper adhesive layer A, an upper electrode layer and an upper substrate layer which are sequentially stacked. The manufacturing method comprises electrode layer manufacturing and transducer layer manufacturing. The electrode layer adopts a laser cutting plus one-time transfer technology, and compared with the magnetron sputtering plus two-time transfer technology of the prior art, the electrode layer processing speed is faster, and the cost is lower. The transducer layer also adopts a laser cutting technology, and compared with the diamond wire cutting of the prior art, the operation is simple, and the processing precision is high. The flexible ultrasonic probe manufactured by the application can detect the seed arranging state in a seed arranging tube and can also be applied to other material flow detection. Compared with the infrared detection of the prior art, the flexible ultrasonic probe has strong anti-interference ability, high detection precision and low total cost.

According to the ultrahigh-resolution ultrasonic imaging system based on the ultrasonic vortex and the application of the ultrahigh-resolution ultrasonic imaging system, an imaging object is detected by emitting vortex sound fields of different orders, the imaging object, an ultrasonic collecting device and an ultrasonic vortex emitting module are included, and the ultrasonic vortex emitting module comprises an amplitude phase encoding array and an ultrasonic beam modulation structure; vortex distribution is generated through the amplitude phase coding array, the size of a vortex sound field is regulated and controlled through the ultrasonic beam modulation structure, the ultrasonic collection device collects vortex information after passing through an imaging object, and initial vortex distribution which cannot directly reflect the information of the imaging object is obtained. The invention also provides an ultrahigh-resolution ultrasonic imaging method of the ultrasonic vortex, and the method comprises the steps: extracting object information from the initial vortex distribution without object imaging information, and obtaining the initial distribution of an object to be imaged; and further optimizing the initial distribution of the to-be-imaged object through a high-resolution ultrasonic imaging reconstruction algorithm to obtain a super-resolution image of the to-be-imaged object. And the imaging resolution is obviously improved.

A sensor apparatus (1) according to an embodiment of the present invention for achieving the above-mentioned purpose comprises: an oscillator (22) configured to generate and transmit signals for detection; a main board (34) electrically connected to the oscillator (22), and on which is mounted a control chip for interpreting and processing signals transmitted by the oscillator (22); a cover (21) housing the oscillator; a case (31) housing the main board and having an end to which the cover is inserted and coupled; a shield body (351) enclosing at least a portion of the main board, to shield noise introduction; and a waterproof cushion (352) interposed between a rear end of the cover and a front end of the shield body (351).

The present invention relates to a high-frequency sensor suitable for short-range detection, comprising a first shell, a piezoelectric ceramic piece and a first matching layer. The piezoelectric ceramic piece is arranged in the first shell, and the piezoelectric ceramic piece is connected to one end face of the first matching layer. The first matching layer is embedded in the first shell, and the other end of the first matching layer protrudes out of the first end of the first shell. In the above-mentioned high-frequency sensor suitable for short-range detection, after the first matching layer is embedded in the first shell, on the one hand, the first matching layer is embedded and fixed in the first shell, and the entire high-frequency sensor suitable for short-range detection has a relatively stable structure; on the other hand, since the end of the first matching layer protrudes out of the first end of the first shell, the binding force of the first shell on the surrounding areas of the first matching layer can be reduced, which can greatly reduce the phenomenon of insufficient echo signals. That is, it can be suitable for short-range detection and has a good echo signal.

An electronic device is provided. The electronic device includes multiple transducer pixels. Each of the transducer pixels includes a sonic transducer, a demultiplexer electrically connected to the sonic transducer, a driving line electrically connected to the sonic transducer, a switching line electrically connected to the demultiplexer, and a reading line electrically connected to the demultiplexer. The driving line is used to provide a driving signal to the sonic transducer to emit sonic waves. The switching line is used to turn on the demultiplexer to output the sensing signal received by the sonic transducer to the reading line.

Present disclosure discloses a device (100) for indicating orientation of an object (101). The device (100) includes a housing (1) configured to contain a fluid (2), which may be homogenously distributed along and / or across an internal volume of the housing (1). Further, the device (100) includes a source (3) configured to generate an electron beam to travel along and / or across a portion of the fluid (2) in the housing (1). The device (100) includes a control unit (5) coupled to the receiver (4) and one or more networking devices, to determine deflection of the electron beam from a normal condition to a deflected condition under presence of a magnetic field, and to hence determine displacement of the object (101) about the pitch / roll / yaw axes based on the deflected condition. With such configuration, the device (100) aids to reduce or eliminate complex techniques for determining orientation of object (101) at low cost.

The present invention provides an ultrasonic flight sensor and a manufacturing method thereof, including a cavity disposed in a semiconductor substrate, an excitation layer disposed above the cavity and having a patterned design, and an elastic film covering the cavity and wrapping the patterned excitation layer. Among them, the excitation layer includes a first electrode layer, a second electrode layer, and a piezoelectric layer disposed between the first electrode layer and the second electrode layer. The present invention realizes the miniaturization of the ultrasonic flight sensor, so that the produced ultrasonic flight sensor can achieve the expected performance. Further, the present invention opens holes in the edge region of the elastic film corresponding to the cavity, which is beneficial to reducing the influence of the elastic film stress on the frequency of the ultrasonic flight sensor.

A method comprising transmitting, by an electric conductor disposed in a wellbore, a time-varying electric signal to a first reflector wirelessly coupled to the electric conductor and a sensor, wherein the sensor is wirelessly coupled to the electric conductor via the first reflector, receiving a first reflected signal from the first reflector, analyzing the first reflected signal to determine a sensor value for the sensor, and determining, based on the sensor value, one or more downhole parameters.

A sensor apparatus according to an embodiment of the present invention for achieving the above-mentioned purpose comprises: an oscillator configured to generate and transmit signals for detection; a main board electrically connected to the oscillator, and on which is mounted a control chip for interpreting and processing signals transmitted by the oscillator; a cover housing the oscillator; a case housing the main board and having an end to which the cover is inserted and coupled; a shield body enclosing at least a portion of the main board, to shield noise introduction; and a waterproof cushion interposed between a rear end of the cover and a front end of the shield body.

An apparatus comprising an array of polymer-based capacitive micromachined ultrasonic transducers positioned on a substrate. The substrate may be at least substantially transparent to ionizing radiation, be flexible, and / or have walls positioned thereon to protect the transducers.

Systems and methods for Wi-Fi sensing are provided. A method for Wi-Fi sensing carried out by a sensing algorithm manager including at least one processor configured to execute instructions. A sensing measurement based on a sensing transmission transmitted by a sensing transmitter and received by a sensing receiver is obtained. Then, a device context of a sensing pair associated with the sensing transmission is determined. The sensing pair includes the sensing transmitter and the sensing receiver. The sensing measurement is associated with the device context. A sensing algorithm is executed according to the sensing measurement and the device context to generate a sensing result.

The present disclosure relates to an integrated system for driving a magnetic body and recognizing the position thereof. The system includes a magnetic field generating unit having four electromagnetic coils radially spaced apart from each other by the same distance and a coil frame to which the electromagnetic coils are connected, an RF coil unit disposed in a through-hole included in the center of the coil frame, a driving unit orthogonal to the coil frame and connected to allow the coil frame to slide in one axial direction, and a processing unit configured to generate movement path information of the coil frame and desired current information of each of the electromagnetic coils.

The application discloses a method for obtaining a graphitized in-situ antenna by ablation of a diamond surface and application thereof, and aims at solving problems of a current microwave antenna, such as great interference from external factors and poor system integration. The method for obtaining the graphitized in-situ antenna comprises the following steps: firstly, cleaning a diamond substrate; secondly, spin-coating a photoresist on the surface of the cleaned diamond substrate, performing photoetching according to an antenna pattern, and then immersing the photoresist in a developing solution to form a mask; opening a radio frequency power supply to input energy of 50-100 W to ignite plasma, and then opening a baffle to deposit a transition metal film; and finally, placing the diamond substrate into a quartz glass tube to perform vacuum sealing, and performing high-temperature heating treatment. The application further relates to a method for obtaining a graphitized in-situ antenna by laser ablation. The application obtains a graphitized antenna pattern by using a transition metal high-temperature catalytic etching or laser ablation on the surface of the diamond, and the antenna can better reduce interference from external factors and improve integration.

A hydraulic cylinder assembly includes a cylinder body, a piston configured to slide within an interior of the cylinder body, and a cylinder head coupled to the cylinder body. The cylinder head includes a cavity, and a bore that extends between the cavity and the interior of the cylinder body. The hydraulic cylinder assembly includes a radar sensing unit disposed within the cavity. The radar sensing unit includes a radar signal emitter and a radar signal detector oriented respectively to emit and detect radar signals through the bore into the interior of the cylinder body. The hydraulic cylinder assembly includes a dielectric lens between the radar sensing unit and the interior of the cylinder body, the dielectric lens having a convex side facing the radar sensing unit and a planar side opposite the convex side facing the interior of the cylinder body.

There are provided an ultrasonic transducer and methods for designing and manufacturing the same. The ultrasonic transducer includes a piezoelectric composite layer configured to be in acoustic communication with a sample and having at least partially decoupled acoustic impedance and electrical impedance properties. The piezoelectric composite layer includes an array of spaced-apart piezoelectric regions, each being made from a piezoelectric material, a filler material positioned between adjacent spaced-apart piezoelectric regions, the filler material comprising a polymer matrix and a non-piezoelectric material in contact with the polymer matrix. In some embodiments, the ultrasonic transducer includes an electrically insulating non-piezoelectric composite layer extending over the piezoelectric composite layer for electrically insulating the piezoelectric composite layer from the sample, the electrically insulating non-piezoelectric composite layer being acoustically matched to the piezoelectric composite layer and the sample.

The invention belongs to the technical field of sensors, and particularly relates to a surface acoustic wave sensor working at constant temperature and a preparation method thereof. The sensor comprises a heat dissipation layer, a thermoelectric refrigeration layer and a sensing layer, the heat dissipation layer serves as a base of the whole surface acoustic wave sensor and has high heat conduction performance; the thermoelectric refrigeration layer adopts a semiconductor refrigerator, the upper surface of the thermoelectric refrigeration layer is connected with the heat dissipation layer through heat-conducting silicone grease or in a welding manner, and the lower surface of the thermoelectric refrigeration layer is connected with the sensing layer through heat-conducting silicone grease or in a welding manner; the sensing layer comprises a composite functional substrate, and an SAW sensing unit and a temperature sensing unit which are integrated on the composite functional substrate; the device is compact in structure, high in integration level, high in temperature control precision, fast in thermal response and uniform in temperature field, and has a good application prospect.

The invention discloses a microwave sensor based on SSPP and a movable resonator and a measuring method of the microwave sensor. The microwave sensor is used for simultaneously and independently measuring the dielectric constant and biaxial linear displacement of a material. The sensor adopts a double-layer PCB structure; the lower layer PCB is integrated with an SSPP structure to form a low-pass filter, and the cut-off frequency of the low-pass filter is sensitive to the dielectric constant of a material to be detected; the upper PCB serves as a pure dielectric layer, limits two displacement areas and guides the two sliding blocks embedded with the independent ring resonators to slide. The two ring resonators generate two independent notch frequencies in a passband of the filter, and the reflection phases of the two ring resonators are in linear relation with the displacement of the corresponding sliding blocks respectively. The core of the invention lies in that material sensing and double-displacement sensing are completely decoupled in electromagnetic response and do not interfere with each other, and multi-parameter synchronous measurement on a single compact device is realized; the device can effectively achieve the measurement of the dielectric constant and two independent linear displacements of the material at the same time, achieves the complete decoupling of a sensing signal, and avoids the problems in the aspects of cross sensitivity and the like.

The invention discloses a coating thickness and elastic modulus synchronous measurement method based on double-frequency surface acoustic wave frequency characteristics, and belongs to the technical field of measurement. A coating thickness-elastic modulus parameter space is constructed in a reasonable measurement range; for each point in the parameter space, generating a theoretical frequency characteristic distribution map of the parameter space; the surface acoustic wave on the surface of the coating is excited through the linear array slit grating, and a synthetic error function is constructed; traversing the parameter space to finally generate a matching error distribution diagram of the parameter space; the minimum value point of the error function in the distribution diagram corresponds to the optimal coating thickness and elastic modulus inversion result. The method is used for solving the problems that in the prior art, a narrowband method is single in parameter, and a broadband method needs multi-point scanning.

To provide a matrix array detector capable of reading out consecutive pixel rows or reading out a group of a plurality of pixel rows, and a usage method thereof.SOLUTION: A pixel array is matrixed along the rows and columns to generate a signal. Row conductors L(i), L(i+1), L(i+2), and L(i+3) each drive one row of pixels. Each driver module (SR_A) of a first group (A) sends a selection signal (Out_A) to one of the row conductors of the first group. Each driver module (SR_B) of a second group (B) sends a selection signal (Out_B) to one of the row conductors of the second group. The row conductors of the first and second groups are interlaced.SELECTED DRAWING: Figure 3

This disclosure relates to the inspection of train wheels while mounted on a train that is moving on a railroad track. A magnetostrictive EMAT transducer is built using an RF Coil, a static biasing magnetic field, and a strip of highly magnetostrictive material. This magnetostrictive EMAT transducer is subsequently attached to a rail on the track so the wheel tread of the moving train can contact and apply downward pressure on the magnetostrictive EMAT transducer. A mechanism under the transducer provides enough counterforce to pressure-couple the transducer with the tread of the wheel. Once the transducer is ultrasonically coupled with the wheel, an ultrasonic instrument sends a pulse to the transducer generating a Shear Horizontal wave that travels circumferentially following the tread body. The Shear Horizontal wave generated with this magnetostrictive strip EMAT transducer penetrates deep into the wheel tread and permits detection of both surface and internal defects.

A location of conductive material in the vicinity of a magnetoinductive waveguide comprising an array of magnetically coupled resonant circuit elements is determined by analysing a reception signal detected from a reception resonant circuit element of the array. An echo signal is detected in the reception signal, the echo signal corresponding to reflected magnetoinductive waves i by reflection of injected magnetoinductive waves at an impedance discontinuity created by conductive material in the vicinity of a resonant circuit element. A timing of the echo signal is determined and the location of the resonant circuit element at which the impedance discontinuity is created is determined from the timing, as the location of the conductive material.

A multi-mode microwave waveguide blade sensing system (500) includes a transceiver, a waveguide (174b), and a probe sensor (176). The transceiver generates a microwave energy signal having a first waveguide mode and a different second waveguide mode. The waveguide (174b) includes a first end that receives the microwave energy signal. The probe sensor (176) includes a proximate end (178a) that receives the microwave energy signal from the transceiver and a distal end (178b) including an aperture that outputs the microwave energy signal. The probe sensor (176) directs the microwave energy signal at a first direction based on the first waveguide mode and a different second direction different based on the second waveguide mode. The probe sensor (176) receives different levels of reflected microwave energy based at least in part on a location at which the at least one microwave energy signal is reflected from the machine.

An ultrasonic multivariable process transmitter (4) includes an ultrasonic transmitter (68) configured to transmit an input ultrasonic vibration pulse into a proximal surface (24) of a wall. The pulse propagates through the wall and reflects from a distal surface (32) to form a reflected output ultrasonic vibration pulse. An ultrasonic receiver (70) receives an ultrasonic vibration pulse at the proximal surface (24). Processing circuitry (62) correlates the received reflected output ultrasonic vibration pulses with a change in the surface of the wall. The received pulse is further a function of a process variable of a process related to a process fluid contacting a surface of the wall. An output indicative of the process variable of the process is provided.

The utility model relates to the technical field of ultrasonic pore-forming detection, and discloses a novel ultrasonic pore-forming detection device which comprises an ultrasonic detection probe, a fixed block is fixedly connected to the top of the ultrasonic detection probe, and two limiting columns are symmetrically arranged on the top of the fixed block. The two first rotating blocks can be driven to expand and contract through lifting of the threaded sleeve block, so that the distance between the two first rotating blocks is adjusted so as to adapt to holes, needing to be detected, of ultrasonic detection probes with different hole diameters, and when the two first rotating blocks rotate, through meshing of two gears in each of the two connecting pieces, the two first rotating blocks are driven to rotate; the distance between the two third rotating blocks and the two first rotating blocks is adjusted synchronously, so that the distance between the two first rotating blocks and the two third rotating blocks is adjusted to be attached to the hole walls of holes with different hole diameters, and an ultrasonic detection probe can stably ascend and descend at the hole temple part when a winch is used for taking up and paying off.

The invention discloses a self-adaptive acousto-optic fusion detection sensor and an operation method thereof, and the self-adaptive acousto-optic fusion detection sensor comprises the following modules: a multi-mode sensing module, an environment sensing module, an intelligent processing unit, a data transmission module, and a power management module. According to the invention, through the environment sensing module and the environment prediction model, the sensor can dynamically adjust the working mode according to the environment change so as to adapt to various complex scenes and have strong adaptability; the multi-modal data fusion and deep reinforcement learning algorithm significantly improves the precision and reliability of target detection and recognition; an intelligent power management system and an energy recovery technology ensure stable operation of the sensor in different environments, and the service life is prolonged; the remote monitoring and management are supported, the operation and maintenance cost is reduced, the flexibility and expandability of the system are improved, and the system has very high intellectualization.

The invention relates to a lithium ion battery expansion force estimation method based on an ultrasonic signal, and belongs to the technical field of battery monitoring. The method comprises the following steps: S1, fixing two ultrasonic sensors on the same side of a battery at an interval; s2, selecting a plurality of lithium ion batteries integrated with ultrasonic sensors, applying a preload to the batteries by using a programmable dynamic load clamp, collecting expansive force data in real time through a force sensor, synchronously connecting a battery test system, designing a constant-current charge-discharge and NEDC dynamic working condition cycle experiment, and recording voltage, current, temperature and internal resistance data; s3, data batch processing and signal feature extraction are carried out on the collected waveform original data, and battery current data and expansive force data in the circulation process are extracted; s4, constructing a random forest model, and training the model by taking the ultrasonic signal feature data and the current data as model input and taking the expansive force data as model output; and S5, carrying out lightweight processing on the trained model.