13 results about "Magnetostrictive transducers" patented technology

The invention belongs to the technical field of magnetic variable measurement, and particularly relates to a power driving compensation method and system for magnetostrictive load characteristic monitoring, and the method comprises the steps: obtaining a reference zero point of magnetic performance evolution in a cold state environment of an electromagnetic system according to the center frequency of the electromagnetic system; calculating a current main frequency impedance module value and a phase difference through an electrical parameter characterization method, and obtaining a thermal drift index reflecting a hysteresis loop distortion degree in combination with a reference zero point; obtaining correction factors of all orders based on the thermal drift index and the average output power at the current moment, and dynamically updating a coefficient vector of the inverse model; and constructing a pre-distortion driving voltage signal capable of counteracting nonlinear interference by using the new coefficient and the ideal guided wave voltage sequence, and inputting the pre-distortion driving voltage signal to a power amplifier to drive the magnetostrictive transducer. According to the invention, the problem of predistortion failure under a variable-temperature working condition in the prior art is solved, and the signal-to-noise ratio of high-power long-distance guided wave detection is remarkably improved.

The application discloses a double-excitation super-magnetic elliptical vibration turning tool rest device, which comprises amplitude rods and super-magnetic strain transducers, the amplitude rods are two, are arranged in a V shape and form an integrated structure, the integrated structure is provided with a tool blade mounting groove at the tail end, each amplitude rod is fixedly connected to the super-magnetic strain transducer, and the two super-magnetic strain transducers are connected to the tool rest through two clamping blocks respectively. The tool rest rod is formed by crossing two amplitude rods, the super-magnetic strain transducers are connected to the tail end respectively, the two super-magnetic strain transducers are controlled to realize the circular vibration track of the tool tip of the tool blade mounted on the tool rest rod, the turning tool body is integrated on the double amplitude rods crossed in a V shape, the transducer shell is mounted on the tool rest, the mechanical rigidity of the tool is improved, the ultrasonic energy transmission loss is reduced, and the machining performance is improved.

The application relates to an integrated heat dissipation structure for a giant magnetostrictive transducer, which internally cools the transducer from two aspects. One aspect is to reduce heat generation. In order to inhibit eddy current loss of a permanent magnet ring, the complete permanent magnet ring is first divided into a tile-shaped permanent magnet ring, and the tile-shaped permanent magnet ring is coated with insulating paint. Secondly, in order to inhibit eddy current loss of a 3D-printed copper alloy framework, a longitudinal and transverse intersecting cross-shaped fine gap is designed in the internal structure of the two end disc structures and the middle circular tube structure of the integrated framework, and the surfaces of the left and right frameworks are coated with insulating paint. The other aspect is to increase heat conduction. The permanent magnet ring placement structure and the coil winding structure are integrated into a framework. In order to facilitate the installation of the tile-shaped permanent magnet ring, the framework is divided into two parts which can be separated left and right. After the tile-shaped permanent magnet ring is installed, the left and right frameworks are assembled into an integral framework through the mortise and tenon structures at the upper and lower ends. Secondly, the air gap generated during assembly is coated with heat-conducting silicone grease.

The application relates to a dynamic sealing structure of a downhole double-actuator giant magnetostrictive transducer, which dynamically seals the output rod of the giant magnetostrictive actuator from two aspects. One aspect is to prevent water from entering, rubber sleeves capable of fitting the output rod and the connecting ring in shape are arranged at both ends of the central through hole of the connecting ring, and a suitable adhesive is selected to bond the rubber sleeves on the output rod and the connecting ring, and the elastic rubber sleeves are used for dynamically sealing the output rod in axial reciprocating motion. Secondly, O-ring grooves are designed on the side wall of the central through hole of the connecting ring and the output rod, and the O-rings are respectively arranged in the grooves on the side wall of the central through hole of the connecting ring and the output rod in the form of being embedded or sleeved, and the O-rings are compressed and deformed through interference fit with the contact surfaces of the output rod and the connecting ring to prevent water from entering. The other aspect is water storage, the upper connecting ring and the lower connecting ring are manufactured by using a metal 3D printing technology, and the entering water is guided to the water storage groove through the drainage groove and the funnel-shaped drainage channel structure in the connecting ring.

The application discloses a kind of super magnetostrictive transducer dynamic stress measurement system and method.There is power supply circuit;Super magnetostrictive transducer, the power supply circuit is connected with the super magnetostrictive transducer, the super magnetostrictive transducer includes vibrator and shell, the vibrator is arranged in the shell, and the upper end and lower end of the vibrator are connected with the shell;Measuring rod, the upper end and lower end of the vibrator are equipped with the measuring rod, and are connected with the shell by the measuring rod;First diamagnetic field strain gauge, including two first resistance strain gauges and first insulating material film, two the first resistance strain gauges are respectively test piece A and test piece B, the test piece A is bonded with the measuring rod;Dynamic strain meter, the positive electrode line and negative electrode line of the first diamagnetic field strain gauge are respectively connected with the access channel of the dynamic strain meter.Effectively measure the actual stress variation inside super magnetostrictive transducer.

The application discloses a nonlinear time domain characteristic analysis method and system of a giant magnetostrictive transducer. The method comprises a segmented magnetic circuit magnetic field model of the giant magnetostrictive transducer under the consideration of a permanent magnet bias magnetic field, a solid mechanics model of the giant magnetostrictive rod under the consideration of a magnetostrictive effect of the giant magnetostrictive rod, and a pressure acoustic model of underwater vibration of the transducer, a coupling strategy of an electromagnetic field and a solid mechanics field is constructed, and a coupling strategy of the solid mechanics field and a pressure acoustic field is constructed, so that a nonlinear time domain model of the whole electric-magnetic-mechanical-acoustic coupling of the giant magnetostrictive transducer is established, time domain output characteristics of the transducer model are analyzed under different bias magnetic fields and prestress conditions, and thus a method is provided for the design of the giant magnetostrictive electroacoustic transducer.

The utility model relates to the field of transducers, in particular to a high-power ultrasonic magnetostrictive transducer. A high-power ultrasonic magnetostrictive transducer comprises a giant magnetostrictive rare earth rod, the giant magnetostrictive rare earth rod is inserted in a special iron core, and the outer side of the special iron core is sleeved with an electromagnetic induction coil. And a pre-tightening force is applied to the giant magnetostrictive rare earth rod. Threads are arranged at the two ends of the special iron core, the two prestressed screws are connected to the two ends of the special iron core through the threads, and the two prestressed screws are pressed on the giant magnetostrictive rare earth rod to apply pretightening force to the giant magnetostrictive rare earth rod. And the special iron core is fixed in the middle of the fixed base. According to the energy converter, the size of the energy converter is reduced under the condition that the output power of the energy converter is guaranteed through a new structural form, and the output power density of the energy converter is improved. A plurality of vibration units can be connected in series, and the defects in the prior art are overcome.

The application relates to a kind of transducers, more particularly a kind of magnetostrictive transducer.It includes permanent magnet, magnetostrictive body and coil, the upper and lower sides of the permanent magnet are bonded with magnetostrictive body, coil is sleeved on the outside of permanent magnet and two magnetostrictive bodies.It also includes round sleeve and vertical column, the outside of the permanent magnet is sleeved with round sleeve, two vertical columns are arranged left and right, and the middle parts of two vertical columns are respectively fixed on the two sides of round sleeve.It also includes collar and protruding block, the collar is sleeved on the magnetostrictive body, and the two sides of the collar are respectively fixed with protruding block, and the two protruding blocks on the collar are respectively slidably connected on two vertical columns.It also includes elastic rod, each protruding block is fixed with elastic rod, and the other end of each elastic rod is respectively fixed on the end of corresponding vertical column.It can be effectively transduced through two magnetostrictive bodies.

The invention provides an ultrasonic-assisted compression molding device and method combining alternate vibration and mixed frequency beat vibration, and relates to the technical field of ultrasonic-assisted compression molding, the ultrasonic-assisted compression molding device comprises a compression molding mold, an ultrasonic vibration device and a driving system, and the ultrasonic vibration device is electrically connected with the driving system; the ultrasonic vibration device comprises a plurality of ultrasonic vibration assemblies arranged in the circumferential direction of the compression molding mold, and all the ultrasonic vibration assemblies are driven by the driving system to vibrate alternately in sequence; each ultrasonic vibration assembly comprises vibration units oppositely arranged on the two sides of the compression molding mold, and the two vibration units corresponding to the same ultrasonic vibration assembly are driven by the driving system to vibrate in a staggered frequency mode. The heating degree of the magnetostriction transducer can be remarkably reduced, long-time stable and efficient work is guaranteed, pulsation amplitude vibration can be formed, the damping resistance is enhanced, the vibration intensity of a mold is improved, meanwhile, vibration energy distribution is more uniform, and the forming stability is improved.

The present application relates to sludge treatment technical field, specifically to a kind of sludge resourceful treatment device for municipal engineering, including processing box, fixedly arranged fixed shell in the inside of processing box, and rotating inner container is rotationally arranged in the inside of fixed shell.The present application is continuously rotated by rotating inner container in the inside of fixed shell, cooperate with the polygonal wave-shaped reflecting surface specially provided in inner wall, make sludge continuously dynamic cross microwave wave peak and trough area in spiral falling process, the originally fixed standing wave node is scattered, microwave energy is uniformly projected to the full circumferential surface of sludge without dead angle, and heat energy utilization is greatly improved;At the same time, magnetostrictive transducer embedded in the outer wall of rotating inner container rotates synchronously with inner container, to ensure that ultrasonic energy directly acts on the core of sludge flow field that is turned over, microjet and shock wave generated by ultrasonic cavitation effect are used, and microwave thermal effect produces significant synergistic effect, and the process of sludge cell wall is accelerated.

This invention belongs to the field of magnetic variable measurement technology, specifically relating to a power-driven compensation method and system for monitoring the characteristics of magnetostrictive loads. The method includes: obtaining a reference zero point for the evolution of magnetic performance under cold conditions based on the center frequency of the electromagnetic system; calculating the current dominant frequency impedance magnitude and phase difference using an electrical parameter characterization method, and obtaining a thermal drift index reflecting the degree of hysteresis loop distortion in conjunction with the reference zero point; obtaining correction factors of various orders based on the thermal drift index and the average output power at the current moment, and dynamically updating the coefficient vector of the inverse model; constructing a pre-distortion driving voltage signal that can cancel nonlinear interference using the new coefficients and an ideal guided wave voltage sequence, and inputting it to a power amplifier to drive the magnetostrictive transducer. This invention solves the problem of pre-distortion failure in existing technologies under variable temperature conditions, significantly improving the signal-to-noise ratio of high-power, long-distance guided wave detection.

The application discloses a kind of based on SCReg-PGNN's giant magnetostrictive transducer electromagnetic energy loss optimization method, builds the magnetic energy loss test platform of giant magnetostrictive rod and carries out test to the magnetic energy loss under different working conditions, then, the electromagnetic loss of excitation coil is accurately calculated by considering skin effect, proximity effect and edge effect, finally, the electromagnetic energy loss model of high-power giant magnetostrictive transducer based on SCReg-PGNN is established, the electromagnetic loss characteristics of giant magnetostrictive transducer are calculated quickly, finally, the best electromagnetic structure parameters of high-power giant magnetostrictive transducer are searched by means of non-dominated sorting particle swarm optimization algorithm.The application can realize high-precision modeling and response prediction of transducer electromagnetic loss under multiple working conditions and multiple variable input conditions, and further realize the collaborative optimization of structure parameters under multiple objectives, so as to improve the overall energy efficiency and working reliability of transducer system.

The invention discloses a broadband impedance matching network design method based on a cuckoo catfish algorithm, and the method comprises the following steps: S1, building an equivalent circuit model of a magnetostrictive transducer, and constructing an evaluation model of a fitness function; s2, designing a four-order impedance matching network according to the magnetostrictive transducer circuit and the working frequency bandwidth of the magnetostrictive transducer circuit, and building a working circuit model of the magnetostrictive transducer after the impedance matching network is added; s3, performing optimization calculation on the selection of the impedance matching network element parameters by adopting a cuckoo catfish algorithm and taking fitness function maximization as a target function to obtain optimal element parameters; according to the method, the catfish cuckoo algorithm is utilized, global parallel search is achieved, the convergence speed is high, the problems that the bandwidth of a traditional matching network is limited, and parameters are prone to falling into single-frequency-point local optimum are effectively avoided, the average conversion power gain of the magnetostrictive transducer in the working frequency range is made to be maximum, and the efficiency of the magnetostrictive transducer is improved. And the broadband transmission efficiency of the magnetostrictive transducer system is obviously improved.