58 results about "Transducer" patented technology

A micromachined acoustic transducer comprising a parylene diaphragm piezoelectric transducer. The parylene diaphragm has far lower stiffness than the silicon nitride. The method for fabricating the parylene diaphragm acoustic transducer utilizes a prestructured disphragm layer utilizing silicon nitride which is compatible with high temperature semiconductor process. A silicon nitride layer is patterned and partially removed after forming the parylene diaphragm layer in order to enhance the structural qualities of the parylene diaphragm. The diaphragm may be flat or dome-shaped.

An electronic system includes a three terminal device having a light emitting portion and a magnetically sensitive portion. The magnetically sensitive portion is for modulating light emission from the light emitting portion. The device is a spin valve transistor having a light-emitting quantum well in its collector. The device can convert a magnetic digital signal to both an electrical digital signal and an optical digital signal, wherein either or both of these signals can be provided as a device output. The magnetically sensitive portion of the device is formed of a pair of magnetically permeable layers. When the layers are aligned electron current can pass through with sufficient energy to reach a quantum well where they recombine, generating light. The device may be used to read a magnetic storage medium, such as a disk drive. Or it can be used to provide a display or a memory array composed of single device magnetic write, optical read memory cells. Amplification can be provided to the transistor by adjusting the collector base voltage to provide secondary electrons by impact ionization to provide greater electron current and a correspondingly larger optical emission signal.

Implantable systems and methods (e.g., using an implantable medical device) for measuring distance including a transmit/receive acoustic transducer implantable at a first location for transmitting and receiving acoustic signals, an echo acoustic transducer implantable at a second location for receiving the acoustic signal from the transmit/receive acoustic transducer and in response thereto transmitting a return echo signal to be received by the transmit/receive acoustic sensor, and a controller to control transmission of the acoustic signal from the transmit/receive acoustic transducer at a transmit time and determine a receive time corresponding to the time the transmit/receive acoustic transducer receives the return echo signal. The distance between the transmit/receive acoustic transducer and the echo acoustic transducer is determined as a function of the transmit time and the receive time.

A vehicle having a system for determining that there is a possibility that the vehicle has entered or is about to enter water at a vehicle wading depth. The system comprising at least one under-body mounted sensor 14, 15 both configured to remotely and directly detect the presence of water substantially below and about the under-body mounted sensor 14, 15. The under-body mounted sensor 14, 15 may be an ultrasound transducer sensor both configured to estimate a depth of water the surface of which is substantially below the sensor and to detect the presence of water when the sensor is in contact with water. In response to determining that there is a possibility that the vehicle has entered or is about to enter water at a vehicle wading depth, the system is configured to implement one or more vehicle control strategies. A method based on the system may suspend the stop/start function of the vehicle to prevent automatic shut down of the engine and/or activate a stopped internal combustion engine.

A sensor device, comprising two symmetrically disposed sonolucent wedges (5), and a connecting piece for fixedly connecting the two sonolucent wedges (5); the upper surfaces of the sonolucent wedges (5) are provided with inclined planes; installation holes are formed on the inclined planes; transducers (3) are installed in respective installation holes; one transducer (3) is used to generate ultrasonic waves, and the other transducer (3) is used to receive the ultrasonic waves generated by the previous transducer (3). The residual stress detection system comprises a sensor device, an ultrasonic transmission card, and a data acquisition card.

The invention discloses an ultrasound thickness measuring method and a device based on broadband frequency-modulation and receiving compensation. Thee method structures an intermittent type broadband linear frequency-modulation ultrasound signal by using the method of linear frequency-modulation; broadcasting time of the intermittent type broadband linear frequency-modulation ultrasound signal at the inner part of a workpiece is inverted according to frequency parameters of emitted and received frequency-modulation signals; workpiece thickness is obtained by combining a preset sound speed. The device comprises a handhold type control, a display and an array type ultrasound wave probe component, wherein the array type ultrasound wave probe component is composed of a plurality of ultrasound transducers capable of stimulating the broadband linear frequency-modulation ultrasound wave, wherein one ultrasound transducer is arranged in the middle, and the rest ultrasound transducers are arranged at four sides. The ultrasound thickness measuring method and the device can realize the flaw detection at a near field and a remote field; and the invention is low in energy loss, small in volume, high in precision and strong in antijamming capability; and furthermore, the ultrasound thickness measuring method and the device can adapt various noise environments.

A method of manufacturing an ultrasound transducer for an ultrasound imaging device including a plurality of transducer elements arranged in a two dimensional array on a single carrier of semi-conductor material including the step of providing a buffer layer between the carrier and a layer including piezo electrical material, the buffer layer having a thickness arranged for dicing each of the plurality of transducer elements on the carrier.

A method for diagnosing water-core disease of fruit based on character band of visible near-infrared spectrum includes shining light on surface of fruit, using a numbers of photosensitive transducers to collect spectrum reflectivity information of fruit internal at various character bands, removing off noise of said information, inputting information to monolithic computer through A/D converter, inputting processed information to spectrum model of water-core disease for obtaining diagnosis result of water-core disease and using display to indicate out diagnosis result.

The invention discloses a method for dynamically determining breathing oxygen consumption and a hypoxia device for the method for dynamically determining the breathing oxygen consumption. The method includes the following steps that after distilled water is added from an air vent and reaches a weather bar, a tee valve is closed, a mouse is contained in a hypoxia bottle where soda lime is placed in advance, and then a bottle plug is fastened; when the hypoxia bottle generates 0.5cmH2O negative pressure, water flows in an oxygen consumption determining channel enable the pressure to be -0.5cmH2O constantly, and the amount of consumed oxygen is read out; a high-sensitivity tension transducer is used for automatically monitoring the breathing rate, the breathing range and breathing pressure of the laboratory mouse with oxygen deficiency; when a repeated experiment is performed, air in the oxygen consumption determining channel is exhausted and then the operations are repeated; the hypoxia device established according to the determining method comprises a device body, the hypoxia bottle and a biological signal collecting and processing system. The method for dynamically determining the breathing oxygen consumption and the hypoxia device for the method for dynamically determining the breathing oxygen consumption have the advantages that the pressure is constant, due to the fact that the breathing rate, the breathing range, the amount of the consumed oxygen and the pressure value of the hypoxia environment of the mouse with hypoxia are monitored dynamically, errors caused by manual monitoring are avoided, and the method and the hypoxia device are suitable for determination of the consumed oxygen amount and a hypoxia experiment.

In accordance with embodiments of the present disclosure, a digital microphone system may include a microphone transducer and a digital processing system. The microphone transducer may be configured to generate an analog input signal indicative of audio sounds incident upon the microphone transducer. The digital processing system may be configured to convert the analog input signal into a first digital signal having a plurality (e.g., more than 3) of quantization levels, and in the digital domain, process the first digital signal to compress the first digital signal into a second digital signal having fewer quantization levels (e.g., +1, 0, -1) than that of the first digital signal.

The invention discloses a method for controlling a non-radial displacement transducer of a multi-phase and single-winding bearingless motor. The control for torque and suspension of the multi-phase and single-winding bearingless motor is finished in two planes which are orthorhombic mutually; and a multi-phase inverter is utilized to simultaneously introduce two groups of currents with different phase differences to the motor, thus respectively realizing the torque drive and the rotor suspension of the motor. With respect to the multi-phase and single-winding bearingless motor with the phase number of more than or equal to 7, displacement signals are extracted from another plane different from a torque plane and a suspension plane according to the the characteristics of MDOF (multiple degree of freedom) of the multi-phase motor by utilizing the relationship between mutual inductance and eccentricity among different planes in an eccentric state, so as to research the non-displacement transducer control technology of the motors. In the method, the multi-control DOF of the multi-phase and single-winding bearingless motor is utilized to extract radial displacement information of a rotor under fundamental frequency, thus reducing the system cost, shortening the radial length of a system and improving the system reliability.

The invention relates to a multibeam depth measuring sonar multi-subarray wave beam sharpening method. The method comprises the following steps: carrying out orthogonal transformation on original signals received by a transducer array to obtain needed parsing signals; by use of a subarray divider, carrying out subarray division on the obtained parsing signals to divide the signals into four subarrays overlapped in space and divide the subarrays into two sub wave beam groups; carrying out routine wave beam formation on each subarray, and respectively carrying out first-order sharpening wave beam formation on a sub wave beam group A formed by the first subarray and the fourth subarray and a sub wave beam group B formed by the second subarray and the third subarray; and taking output generated after sharpening wave beam formation of the sub wave beam group A and the sub wave beam group B as input of next-order sharpening wave beam formation, carrying out a second-order sharpening wave beam formation, and taking output after the second-order sharpening wave beam formation as sharpening multibeam output. According to the invention, a tunnel effect can be inhibited under the condition of a quite small computation amount.

A histotripsy therapy system configured for the treatment of brain tissue is provided, which may include any number of features. In one embodiment, the system includes an ultrasound therapy transducer, a drainage catheter, and a plurality of piezoelectric sensors disposed in the drainage catheter. The ultrasound therapy is configured to transmit ultrasound pulses into the brain to generate cavitation that liquefies a target tissue in the brain. The drainage catheter is configured to detect the ultrasound pulses. An aberration correction algorithm can be executed by the system based on the ultrasound pulses measured by the drainage catheter to automatically correct for an aberration effect caused by the ultrasound pulses passing through a skullcap of the patient.

This disclosure describes embodiments of a probe assembly and an inspection system for ultrasonic inspection. Designs for the probe assembly package components to fit into a bore of a hollow target. These designs may incorporate electronics to generate waves and to detect a wide selection of anomalies (e.g., transversal crack, longitudinal crack, and volumetric flaws) that can form in the hollow target. The probe assembly provides support structure to manipulate and operate these electronics in the bore. This support structure facilitates communication of signals, e.g., from transducer elements that operate as a phased array. The probe assembly also includes a fluid circulating system and coupling system that permits the probe device to detach and reattach to match the probe device (and other parts of the probe assembly) to the size of the bore. These systems allow for fluid and electrical signals to circulate through the probe assembly.

An acousto optic element comprises optically transparent acousto optic medium having light incoming plane, light outgoing plane facing light incoming plane, transducer joining plane, and inclined plane tilted to transducer joining plane and piezoelectric transducer on which two opposing planes i.e., electrode layers and are formed and the transducer is connected to transducer joining plane of acousto optic medium through one of the electrode layers, wherein a deposited layer or a coating layer is formed on at least one of ultrasonic transducer or the acousto optic medium, the layer preventing ultrasonic waves generated by oscillation of ultrasonic transducer leaking onto acousto optic medium as a leakage-ultrasonic wave and propagating there, thus obtaining a high light-fading ratio.

The invention provides a calibration device of an electric current transducer, and relates to the field of sensor calibration. A temperature box of the embodiment of the invention provides a preset temperature environment, the transducer sensitivity coefficient under the temperature environment is calibrated by a controller under the temperature environment according to a practical current value in a closed loop circuit and a first current value acquired by a battery management system, accordingly different temperature environments can be provided through the temperature box, the transducer sensitivity coefficient under different temperature environments and different voltage values can be obtained, and accordingly the current acquisition precision of the battery management system can be improved through the transducer sensitivity coefficient.

The invention discloses an intelligent height measuring instrument which comprises a mobile phone terminal 1, a distance measuring device, and a horizontal reference rod 2 installed on the distance measuring device. The distance measuring device is connected with the mobile phone terminal 1, and is a structure according to which a distance measuring processing chip 4, an ultrasonic transducer 6, a buzzer 7, an LED indicator light 8 and a horizontal angle transducer 9 are fixedly installed in a shell 3. The ultrasonic transducer 6, the buzzer 7, the LED indicator light 8 and the horizontal angle transducer 9 are electrically connected with the distance measuring processing chip 4 respectively. The horizontal reference rod 2 is fixedly installed on the shell. The intelligent height measuring instrument has the advantages of being easy to operate, capable of automatically adjusting balance and recording data and high in practicability.

Disclosed herein is ultrasonic scanning apparatus and method for diagnosing a bladder. The ultrasonic scanning apparatus includes a transducer, a transducer support, an analog signal processing unit, a display unit, a central control unit, a first stepping motor, a second stepping motor, and a drive control unit. The transducer emits ultrasonic signals for respective scan lines and receives ultrasonic signals reflected from an object. The transducer support configured such that the transducer is fixedly installed therein. The analog signal processing unit converts the ultrasonic signals into digital signals. The display unit outputs specific image signals. The central control unit performs image processing on the digital ultrasonic signals, outputs the results of the processing to the display unit, and controls the overall operation of the apparatus. The first stepping motor rotates in a first direction. The second stepping motor rotates in a second direction. The drive control unit controls the operation of the first and second stepping motors in response to drive control signals provided from the central control unit.

An apparatus adopting an iron core and an inertial mass is disclosed for exerting high power output by converting a sound signal to vibration so as to stimulate the human hearing organs through the bones. A sound-to-vibration conversion apparatus comprises a housing, a permanent magnet having an N-pole and an S-pole, only one pole of which is fixed to the housing, an electromagnet movably installed into the housing faced either the S-pole or N-pole of the permanent magnet, whichever one is not fixed to the housing, and an inertial mass for amplifying the inertial force of reciprocating movement of the electromagnet, so that the housing with the permanent magnet can be vibrated by the electromagnet, whereby the electromagnet vibrates in a reciprocating fashion towards or away from the permanent magnet in accordance with the incubation between the polarity formed at the electromagnet by acoustic signal applied to the electromagnet and either the N-pole or the S-pole of the permanent magnet.

The invention provides a plug-in type ultrasonic flow meter, a flow metering system and a flow metering method, which belongs to the field of flow monitoring. The push-in type ultrasonic flow meter comprises a main plugging rod, wherein a first branch portion and a second branch portion are spaced and symmetrically arranged at one end of the plugging rod, which is plugged into a pipeline, the first branch portion and the second branch portion are arranged at the upstream and the downstream of the pipeline respectively, a first ultrasonic transducer is arranged on the first branch portion, and a second ultrasonic transducer corresponding to the position of the first ultrasonic transducer is arranged on the second branch portion. Compared with the prior art, the plug-in type ultrasonic flow meter provided by the invention has strong signal reception capacity, and lower channel noise, so that the power consumption is less and the power can be supplied by a battery. Also, the plug-in type ultrasonic flow meter has a stable and concise structure, is convenient in use, and can accurately measure the slow pipe flow rate and pipe flow.

A low-pressure transducer including a disc-shaped metal diaphragm to which a fluid pressure is applied, wherein the diaphragm contains a raised beam formed by thinning the entire exterior surface of the diaphragm except for the beam; and at least one silicon strain gage glass bonded to the beam, wherein the low-pressure transducer can accurately gage pressures at least as low as 15 psi. The present invention also comprises a method for manufacturing a pressure transducer including the steps of forming a cylindrical diaphragm having a top surface and a lower surface; establishing a diameter and a thickness of the diaphragm relative to an operational plane by a creating a hole axially through the transducer body that terminates at the lower surface; and creating a raised surface in the shape of a cross beam integral to the operational surface; and bonding one or more strain gages thereupon.