590 results about "Receiver coil" patented technology

The invention is suitable for the technical field of grounding grid defect evaluation, and provides a transient electromagnetism-based grounding grid corrosion defect evaluation method and system, and the method comprises the steps: placing a sensor of a transient electromagnetic detection device above a to-be-detected region of a grounding grid, injecting a pulse current excitation signal into a conical focusing excitation coil, and carrying out the detection of the to-be-detected region of the grounding grid; acquiring an induced voltage time sequence signal through a receiving coil; extracting at least one characteristic parameter from the induced voltage time sequence signal, wherein the characteristic parameter comprises a signal peak value, peak value time, an attenuation rate or a signal integral quantity; inputting the characteristic parameters into a preset corrosion evaluation model, and performing inversion to obtain a residual thickness value or a corrosion depth value of the grounding grid in the to-be-detected area; generating and outputting a quantitative evaluation result containing the residual thickness value or the corrosion depth value; the method can be implemented in a non-stop state of the grounding grid, and an efficient and reliable decision basis is provided for safe operation and state maintenance of a power system.

The present invention discloses a wireless ultrasonic measurement system and a construction method thereof, wherein the measurement system includes a sensing module and a detection module; the sensing module includes a piezoelectric layer on the surface of the detection object, a first lead-out electrode structure, a first grounding electrode structure, a first insulating plate, and a sensing coil; the first insulating plate is provided with a first opening; the first lead-out electrode structure includes a first lead-out electrode on the top of the piezoelectric layer and a second lead-out electrode in the first opening; the first grounding electrode structure includes a first grounding electrode and a second grounding electrode; the second lead-out electrode and the second grounding electrode are respectively connected to the first lead-out electrode and the first grounding electrode; the sensing coil is provided at the top of the first insulating plate. The detection system of the present invention uses an insulating plate to isolate the sensing coil away from the surface of the detection object, which is conducive to the sensing coil generating a non-zero induced voltage U ind , thereby enhancing the signal of the receiving coil, and realizing contactless ultrasonic signal reception with a receiving distance of up to 20mm.

The invention discloses a semi-aviation transient electromagnetic signal adaptive gain method and system, and relates to the technical field of geophysical exploration, and the method comprises the steps: obtaining a differential signal of a receiving coil, and carrying out the chopping self-stabilization zero amplification processing of the differential signal; the method comprises the following steps: dividing a total time window of a differential signal into a plurality of time channels under a set time reference, adjusting the length of each time channel according to a signal attenuation characteristic, calculating the time length and data point number of each time channel according to a sampling rate and the total time window, and calculating the time length and data point number of each time channel; the data points are distributed to an early time channel, a middle time channel and a late time channel, so that different gain multiples are switched, and adaptive gain amplification is carried out; and the differential signal subjected to adaptive gain amplification is transmitted to a receiver after being collected by an ADC (Analog to Digital Converter). By dynamically adjusting the gain coefficient in different time channels, the technical problems of large dynamic range of transient electromagnetic signals and low signal-to-noise ratio of weak signals are solved, and high-fidelity acquisition of full-time-domain signals is realized.

The invention belongs to the technical field of gap measurement, and particularly relates to a high-temperature-resistant transparent shell type eddy current tip gap measuring device and method, and the device comprises a sensor probe module, a signal conditioning module, a data collection module and a data processing module. The sensor probe module is mounted on the outer wall of the casing; the sensor probe module comprises a permanent magnet excitation source, a soft magnet magnetic core and a receiving coil; the signal conditioning module is electrically connected with the receiving coil and is used for amplifying, filtering and integrating the weak induction signal; the data acquisition module is electrically connected with the signal conditioning module and converts an analog signal into a digital signal; the data processing module is used for processing the acquired digital signals and extracting blade tip clearance information.

A wireless charging receive end, system, and control method related to the field of wireless charging technologies are provided. The wireless charging receive end includes a receiver coil, a compensation network, a power converter, and a receive end controller. The receiver coil converts an alternating magnetic field transmitted by a transmit end into an alternating current and transmits the alternating current to the compensation network. The compensation network compensates for the alternating current and then transmit a compensated alternating current to the power converter. The power converter rectifies the compensated alternating current into a direct current for charging a load. The receive end controller obtains a reference signal based on an input current of the power converter and an input reference current, and sends the reference signal to a transmit end controller.

The invention relates to the technical field of geophysical exploration, in particular to a semi-aviation transient electromagnetic detection system based on cooperation of a robot dog and an unmanned aerial vehicle, and the system consists of a robot dog platform, an unmanned aerial vehicle platform and a ground control station. The robot dog platform comprises a high-power transient electromagnetic transmitter, a line source laying module, a voice warning module and a mobile positioning module, and can automatically lay a line source and inject pulse current to the ground; the unmanned aerial vehicle platform comprises a visual field auxiliary module, a flight driving module and a receiving coil, and the coil can be dragged according to a preset route to collect electromagnetic data; the ground control station is used for job scheduling and data processing. Wiring-transmitting-receiving integrated collaborative operation is realized through the robot dog and the unmanned aerial vehicle, and the robot is suitable for detection of a complex mountain environment.

The objective of the present invention is to achieve downsizing of a power-receiving coil unit including a power-receiving coil.　A power-receiving coil unit (60) comprises: a first power-receiving coil (34a); a ferromagnetic first core member (65) having a first base part (65b) and a core part (65a) that protrudes to one side of the first base part and passes through the first power-receiving coil; a substrate (66) disposed on the other side of the first base part; and a transformer in which a primary-side coil is configured by wiring formed on the substrate. The first core member constitutes a part of the transformer core.

In an embodiment, an apparatus for charging an electric vehicle, can include a receptacle mountable to a structure above the electric vehicle. The receptacle can maintain a charge transmitting device, which can be automatically moveable and directable from the receptacle toward a target area on the electric vehicle associated with a receiving coil mounted on the electric vehicle for the charging of an electric vehicle when the one receiving coil engages with the charge transmitting device when the electric vehicle is located below the receptacle. One or more optical sensors can be utilized to direct the charge transmitting device toward the target.

The invention discloses an underwater vehicle wireless electric energy transmission system with an omnidirectional anti-offset function. The transmission system comprises a magnetic coupler receiving assembly and a magnetic coupler sending assembly. The sending assembly is used for providing a charging magnetic field for the receiving assembly. The magnetic coupler transmitting assembly comprises a stepped coil and an anti-series coil, and the stepped coil is located in the anti-series coil; the magnetic coupler receiving assembly comprises a plurality of receiving coils, magnetic cores are arranged in the receiving coils, and the receiving coils are of solenoid structures and are wound around the magnetic cores; the number of the receiving coils is five, one receiving coil is arranged in the middle of the H shape, and the other four receiving coils are fixed to the ends of the H shape. According to the invention, the magnetic field intensity of the surrounding area of the wireless electric energy transmission system is improved, and the mutual inductance between the transmitting coil and the receiving coil is ensured to be stable when the omnidirectional position offset of the aircraft occurs.

A magnetic resonance (MR) receive coil (18) includes a conducting loop (20) that is resonant at a Larmor frequency of a design-basis B0 magnetic field of at least 3 Tesla; and a conducting trace (22) configured to detune the conducting loop from the Larmor frequency in response to a DC current flowing through the conducting trace. The conducting trace further includes a receive |B1|-field uniformity-enhancing inductor (L3) positioned at an intermediate point along the conducting trace.

The invention relates to an in-hole transient electromagnetic response characteristic numerical simulation method based on a tunnel three-dimensional geoelectric model and an absorption boundary finite element method, and belongs to the technical field of geophysical exploration. The method comprises the following steps: constructing a tunnel full-space three-dimensional conductivity model; based on a Maxwell equation set, a vector potential and a scalar potential are introduced, a vector control equation of a transient electromagnetic field is derived in combination with Coulomb specifications, first-order absorption boundary conditions are established, and a weak form finite element equation is derived through a Galerkin weighted margin method; generating a global sparse matrix by utilizing spatial discretization and unstructured grid division, and performing iterative solution on the dynamic electromagnetic field by adopting a Newmark time discretization method; and simulating the transient electromagnetic response of geological anomalous bodies with different resistivity and the distance between the geological anomalous bodies and the receiving coil, and analyzing the attenuation characteristic and the geometric gravity center effect to obtain an electromagnetic response rule. The device can accurately simulate the electromagnetic response of abnormal bodies such as aquifers and faults in front of a tunnel face and around drill holes.

The utility model discloses a linear displacement sensor, which relates to the technical field of sensors, and comprises a shell, a wire harness, a sheath, a printed circuit board and a sensing element, the printed circuit board is arranged in the shell, a sensing part is arranged on the printed circuit board, one end of the wire harness extends into the shell and is connected with the printed circuit board, and the other end of the wire harness is connected with the sheath. The other end of the wire harness is provided with a sheath, and the lower end of the housing is slidably provided with a sensing element. The induction part comprises a group of exciting coils and two groups of receiving coils, the receiving coils are arranged on the inner sides of the exciting coils, the exciting coils are connected with the oscillating circuit, and the receiving coils are connected with the detection circuit. According to the utility model, the sensing element is connected with the external measured object and is matched with the linear displacement sensor, so that non-contact measurement is realized, stray magnetic fields can be immunized, the interference of disordered magnetic fields is avoided, no magnet is needed, and the cost can be effectively saved.

Provided is a receiving coil device that receives a magnetic resonance signal generated from a subject, the receiving coil device comprising: a first loop coil element corresponding to a first channel; and a second loop coil element corresponding to a second channel. The first loop coil element is disposed at the outer side of a row of teeth in the oral cavity of the subject such that the loop surface of the first loop coil element faces a site to be examined, and the second loop coil element is disposed at the inner side of the row of teeth in the oral cavity of the subject such that the loop surface of second loop coil element faces the site to be examined.

A wireless charging device for use in providing electrical power to one or more portable electronic devices is provided. The wireless charging device includes a ferrous core and a housing surrounding the ferrous core. The housing includes a plurality of guides that align a cable. When the cable is aligned in the plurality of guides and a current is passed through the cable, the cable and the ferrous core act as a transmission coil to transmit power from an electrical power source to at least one receiving coil in a first portable electronic device.

A wireless charger includes a mounting part; a transmit coil, disposed in the mounting part; a charging platform, adjacent to the mounting part, for placing a wearable device with a receive coil; a plurality of steps created on a top surface of the charging platform such that the plurality of steps are at different heights with respect to a horizontal plane; and a power circuit, coupled to the transmit coil to enable the transmit coil to emit electromagnetic waves to the receive coil to charge the wearable device.

The invention discloses an array eddy current detection method and system based on differential and amplitude decoupling, and the method comprises the steps: employing a differential array eddy current probe to collect a defect signal, enabling an excitation coil to be connected with a B end of an AD698, and enabling a receiving coil to be connected with an A end of the AD698; and an amplitude decoupling and phase compensation mechanism is introduced to improve the signal stability and the anti-interference capability in the detection process. The system realizes excitation signal output, received signal synchronous demodulation and amplitude extraction through an AD698 chip, the output form is the ratio of a received signal to an excitation signal, and the response capability to a weak defect signal is enhanced. And in combination with a multi-channel control strategy, automatic scanning and stable switching of a plurality of detection areas can be realized. In the data processing stage, time domain features such as peak values, peak-to-peak values and signal width are extracted, a quantitative evaluation model of the angle, depth and length of the crack is constructed based on the change rule of the time domain features, and reliable technical support is provided for crack detection and life prediction of the metal part with the complex structure.

Provided are a coil unit, a magnetic resonance imaging system, and a control method of the magnetic resonance imaging system, which can be used by being adjusted according to a size of a subject. A coil unit according to the present disclosure is a coil unit that is fixed to a subject by the string-like member, and includes a plurality of receive coils that receive a nuclear magnetic resonance signal of the subject, and a coil cover that has flexibility and on which the plurality of receive coils are two-dimensionally arranged, in which the coil cover has a plurality of through-holes penetrating from one surface to the other surface, the through-holes being disposed at positions corresponding to a size of the subject, into which the string-like members are inserted.

The application discloses a cochlear implant multi-channel stimulation pulse half-wave detection system and method, and relates to the technical field of cochlear implants, in particular to a cochlear implant multi-channel stimulation pulse half-wave detection system and method. The system comprises a test board, a head piece and a speech processor, and further comprises a half-wave detection unit and a multi-channel collector. The test board comprises a receiving coil, a stimulator, a stimulation electrode and a test electrode terminal. The speech processor receives and processes sound signals and encodes the sound signals. The encoded signals are transmitted to the receiving coil through the head piece. After decoding processing by the stimulator, pulse signals with corresponding frequencies and current intensities are generated and transmitted to each stimulation electrode. The stimulation electrode is connected to the test electrode terminal. The test electrode terminal is connected to the multi-channel collector. The multi-channel collector is connected to the half-wave detection unit. The multi-channel collector combines n stimulation electrodes to transmit signals to the half-wave detection unit for half-wave detection. The application utilizes the multi-channel collector and the half-wave detection unit to realize automatic half-wave detection, reduce labor costs, and improve the efficiency and success rate of half-wave detection.

The utility model discloses a wireless charging device for an insulated boom truck, which relates to the technical field of engineering machinery manufacturing and comprises a vehicle-mounted wireless transmitting unit arranged on a truck body, a wireless receiving unit and a platform storage battery, the vehicle-mounted wireless transmitting unit is composed of a human-computer interface, a switching power supply, a direct-current voltage stabilizer, a high-frequency inverter, a transmitting coil and a first controller, the vehicle-mounted wireless transmitting unit is connected to a power supply, the wireless receiving unit is composed of a receiving coil, a rectifying module and a second controller, the receiving coil is arranged outside the lifting platform, and the rectifying module is connected with the second controller. The power supply comprises a chassis storage battery integrated on the vehicle body and a mains supply connected with the external part in an inserted manner. The vehicle-mounted wireless transmitting unit is mounted at the tail part of the vehicle body of the insulating bucket arm, and the wireless receiving module is mounted in the vehicle body at the upper end of the insulating arm; and the wireless charging device charges the platform storage battery by using the electric energy of the chassis storage battery.

A wireless charging accessory is described. The wireless charging accessory is adapted to be attached to an aerosol generating device that includes a first charging port. The wireless charging accessory has a flexible outer sleeve adapted to removably receive the aerosol generating device to attach the wireless charging accessory thereto. A wireless charging assembly (12) includes a power receiving coil (20) for wireless inductive charging. The wireless charging accessory also includes a first printed circuit board assembly (16) with a first printed circuit board (18), and a second printed circuit board assembly (34) that includes a second printed circuit board (36), and a second charging port mounted on the second printed circuit board (36) and adapted to engage with the first charging port when the wireless charging accessory is attached to the aerosol generating device in use. A power circuit is electrically connected to the receiving coil (20) and the second charging port. The power circuit includes one or more electronic components mounted on one or both of the first and second printed circuit boards (18, 36). The first printed circuit board assembly (16) is spaced apart from the second printed circuit board assembly (34).

The utility model belongs to the technical field of stirring devices, and provides a wireless control automatic stirring auxiliary milk brewing device which comprises a stirring cup and a sending terminal, the stirring cup is in wireless communication connection with the sending terminal, the stirring cup comprises a cup cover, a cup body and a cup base, the cup cover is arranged at the upper end of the cup body, the cup base is arranged at the bottom of the cup body, and a cup mouth cover is arranged on the cup cover. A direct-current motor, a receiving coil and a first PCBA are arranged in the cup base, the input end of the direct-current motor is connected with a motor driving circuit, the receiving coil receives encoding information sent by the sending terminal, an MCU of the first PCBA checks the encoding information and then sends an instruction to the motor driving circuit, the motor driving circuit drives the direct-current motor to rotate, the output end of the direct-current motor is connected with the stirring paddle, and the stirring paddle is connected with the cup base. The stirring paddle penetrates through the cup base and the cup body and is arranged in the cup body, and the cup base is provided with a key connected with the first PCBA. Therefore, manual and wireless automatic control stirring integration is realized, and the stirring cup is used for drinking and storage.

The invention relates to the technical field of geological disaster prevention and control, and discloses an underground rock stratum water-bearing while-drilling nuclear magnetic resonance 3D imaging method which comprises the following steps: arranging a plurality of long lead grounding sources with the length of 500-1000 meters and the interval of 10-20 meters on the ground, and supplying alternating current pulses with the frequency of Ramole frequency to enable hydrogen nuclei in underground water to form macroscopic magnetic moment, after the excitation current pulse is cut off, the same coil is used for picking up nuclear magnetic resonance (NMR) signals generated by excitation of different excitation pulse moments; a receiving coil is installed behind the drill bit and dynamically receives FID signals along with advancing of the drill bit. A long wire grounding source is arranged on the ground to form an excitation magnetic field, and a receiving coil is mounted behind a drill bit to dynamically receive nuclear magnetic resonance signals while drilling, so that high-precision detection of the water-bearing property of an underground rock stratum from two dimensions of the earth surface and the underground is realized. The change of the aquifer and the potential water inrush hidden danger can be monitored in real time, and the detection precision and the resolution ratio are effectively improved.

A system including: a target having a first track and a second track, a first receiving coil that is aligned with the first track, the first receiving coil having a first period length; a second receiving coil that is aligned with the first track the second receiving coil having a second period length; a third receiving coil that is aligned with the second track the third receiving coil having a third period length; and a fourth receiving coil that is aligned with the second track, the fourth receiving coil having a first period length; and a magnetic field sensor that is configured to generate an output signal that is indicative of a position of the target, wherein the respective target length is less than any of the first period length, the second period length, the third period length, and the fourth period length.

The invention relates to an integrated circuit for redundant inductive sensor coils. A system for inductive position sensing is described. The transmit coil may generate a magnetic field. The first set of receiver coils may pick up a first voltage signal from the magnetic field. The second set of receiver coils may pick up a second voltage signal from the magnetic field. The first inductive sensor and the second inductive sensor may have a fixed relationship. An integrated circuit (IC) may multiplex the first voltage signal and the second voltage signal to process one of the first voltage signal and the second voltage signal using one channel at a time. The IC may convert the first voltage signal to a first digital parameter and convert the second voltage signal to a second digital parameter. The IC may output the first digital parameter and the second digital parameter to trigger the at least one rationality checker to determine whether the first angular position and the second angular position satisfy a fixed relationship.

The present application provides a neurostimulator and a receiving coil. The neurostimulator includes a receiving coil and a resonant capacitor. The receiving coil receives wireless power from the transmitting coil and has an adjustable inductance. The resonant capacitor is electrically connected to the receiving coil and forms a resonant network with an adjustable resonant frequency with the receiving coil. The resonant network adjusts the efficiency of the receiving coil in receiving wireless power through the adjustable resonant frequency. The receiving coil includes a coil body and a magnetically adjustable structure provided on the coil body. The inductance of the magnetically adjustable structure changes in response to changes in ambient temperature and is negatively correlated with the ambient temperature when the ambient temperature is higher than the rated operating temperature. When the ambient temperature rises to the over-temperature protection temperature, the inductance of the magnetically adjustable structure decreases to below the target inductance value. When the ambient temperature decreases below the rated operating temperature, the inductance of the magnetically adjustable structure remains constant at the rated inductance value.

A smart ring, comprising a ring body. A circuit board assembly (3) and a storage battery (4) are packaged in the ring body; a control chip (32) and an NFC chip (33) are packaged on the circuit board assembly (3); the ring body comprises a ring frame (1); a coil (2) is arranged on a circumferential wall surface of the ring frame (1), and the coil (2) surrounds the circumferential wall surface of the ring frame (1); and the coil (2) is electrically connected to the circuit board assembly (3). According to the present application, a receiving coil is arranged in the circumferential direction of the ring frame, and a traditional NFC signal communication antenna is replaced with the coil, so that the NFC electromagnetic charging receiving coil and the NFC signal communication antenna are integrated into a single antenna, thereby facilitating structural optimization; in addition, the coil is circumferentially arranged around the ring frame, so that the detection range is expanded to the greatest extent. Compared with a traditional approach of arranging an NFC signal communication antenna in a local area, the signal reception range and sensitivity can be effectively increased, thereby enabling a more responsive and stable wireless connection.

The application provides a harmonic suppression circuit of an inductive coupling energy transmission system, which places an auxiliary receiving circuit with a resonance frequency of 3 times, 5 times, 7 times or 2n+1 (n=1, 2, 3…) times of a fundamental frequency on a secondary side, configures a corresponding voltage stabilizing circuit on a direct current voltage output side of the auxiliary receiving circuit, and realizes a self-power supply function of a power utilization device such as a control circuit on the secondary side, and a quality factor Q of the auxiliary receiving circuit is i The harmonic suppression method is simple, does not affect power transmission of a main circuit, and can improve the efficiency of the inductive coupling energy transmission system.

The utility model discloses an inductance encoder for a rotating motor, which relates to the technical field of encoders and comprises a signal receiving and demodulating module, the signal receiving and demodulating module comprises a rotor plate, a stator coil plate and a dual-channel induction inductance sensor chip, the rotor plate is connected with a rotating shaft portion of the rotating motor, and the stator coil plate is connected with the inductance sensor chip. The stator coil plate comprises an exciting coil and a receiving coil, non-contact electromagnetic induction is formed among the rotor plate, the exciting coil and the receiving coil, and the inductance sensor chip is used for demodulating amplitude modulation signals on the receiving coil and converting the amplitude modulation signals into sine and cosine signals; the signal processing module is used for receiving the sine and cosine signals output by the inductive sensor chip and processing the sine and cosine signals to obtain signal information; the signal decoding and outputting module is used for receiving the signal information and converting the signal information into angle position information of a motor rotor plate; the inductance encoder has the characteristics of high anti-interference capability, strong environmental adaptability and low cost.

The invention, which relates to the technical field of wireless energy transmission, discloses a high-robustness magnetic resonance wireless energy transmission system based on a symmetrically distributed emission array, comprising a source coil array, an emission coil array, a receiving coil array and a dielectric substrate. The medium substrate comprises three layers, and the source coil array, the transmitting coil array and the receiving coil array are respectively printed on the three layers of medium substrates. The multi-layer arrangement of the source coil array nested inside and outside is utilized, magnetic resonance coupling and magnetic field focusing in the direction where the source coil array is located can be maximized, the magnetic field intensity is enhanced, a large-range uniform and stable magnetic field is obtained through dense arrangement of the coils in the transmitting coil array, each coil is additionally provided with resonant capacitance, and the magnetic field intensity is improved. And each sub-coil can resonate at the working frequency, so that the sub-coil can be coupled with a receiving coil more conveniently, and the transmission efficiency is further enhanced. The provided technology for improving the magnetic resonance wireless energy transmission robustness has a good effect.